./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:20:22,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:20:22,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:20:22,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:20:22,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:20:22,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:20:22,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:20:22,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:20:22,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:20:22,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:20:22,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:20:22,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:20:22,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:20:22,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:20:22,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:20:22,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:20:22,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:20:22,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:20:22,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:20:22,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:20:22,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:20:22,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:20:22,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:20:22,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:20:22,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:20:22,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:20:22,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:20:22,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:20:22,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:20:22,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:20:22,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:20:22,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:20:22,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:20:22,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:20:22,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:20:22,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:20:22,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:20:22,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:20:22,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:20:22,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:20:22,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:20:22,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-12-18 19:20:22,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:20:22,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:20:22,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:20:22,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:20:22,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:20:22,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:20:22,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:20:22,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:20:22,631 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:20:22,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:20:22,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:20:22,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:20:22,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:20:22,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:20:22,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:20:22,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:20:22,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:20:22,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:20:22,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:20:22,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:20:22,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:20:22,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-12-18 19:20:22,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:20:22,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:20:22,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:20:22,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:20:22,850 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:20:22,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 19:20:22,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc7dc829/45c6477117e94bab8bfff568101ed647/FLAGb8244a214 [2021-12-18 19:20:23,366 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:20:23,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 19:20:23,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc7dc829/45c6477117e94bab8bfff568101ed647/FLAGb8244a214 [2021-12-18 19:20:23,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc7dc829/45c6477117e94bab8bfff568101ed647 [2021-12-18 19:20:23,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:20:23,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:20:23,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:20:23,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:20:23,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:20:23,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c82ef8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23, skipping insertion in model container [2021-12-18 19:20:23,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:20:23,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:20:23,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:20:23,731 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:20:23,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:20:23,810 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:20:23,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23 WrapperNode [2021-12-18 19:20:23,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:20:23,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:20:23,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:20:23,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:20:23,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,861 INFO L137 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2021-12-18 19:20:23,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:20:23,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:20:23,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:20:23,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:20:23,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:20:23,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:20:23,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:20:23,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:20:23,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (1/1) ... [2021-12-18 19:20:23,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:20:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:23,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 19:20:23,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 19:20:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:20:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-18 19:20:23,944 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-18 19:20:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 19:20:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 19:20:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 19:20:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:20:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 19:20:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 19:20:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:20:23,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:20:24,046 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:20:24,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:20:24,274 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:20:24,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:20:24,282 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 19:20:24,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:20:24 BoogieIcfgContainer [2021-12-18 19:20:24,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:20:24,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:20:24,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:20:24,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:20:24,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:20:23" (1/3) ... [2021-12-18 19:20:24,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f5b791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:20:24, skipping insertion in model container [2021-12-18 19:20:24,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:20:23" (2/3) ... [2021-12-18 19:20:24,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f5b791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:20:24, skipping insertion in model container [2021-12-18 19:20:24,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:20:24" (3/3) ... [2021-12-18 19:20:24,289 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-12-18 19:20:24,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:20:24,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-12-18 19:20:24,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:20:24,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 19:20:24,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-12-18 19:20:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 19:20:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:20:24,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:24,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:20:24,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:24,349 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2021-12-18 19:20:24,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:24,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906032926] [2021-12-18 19:20:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:24,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:24,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:24,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906032926] [2021-12-18 19:20:24,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906032926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:24,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:24,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:20:24,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753882495] [2021-12-18 19:20:24,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:24,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:20:24,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:20:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:20:24,557 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:24,687 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2021-12-18 19:20:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:20:24,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:20:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:24,698 INFO L225 Difference]: With dead ends: 134 [2021-12-18 19:20:24,699 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 19:20:24,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:20:24,703 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:24,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 130 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 19:20:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2021-12-18 19:20:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.646153846153846) internal successors, (107), 85 states have internal predecessors, (107), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-18 19:20:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-12-18 19:20:24,743 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 6 [2021-12-18 19:20:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:24,744 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-12-18 19:20:24,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-12-18 19:20:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:20:24,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:24,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:20:24,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:20:24,745 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:24,747 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2021-12-18 19:20:24,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:24,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512402192] [2021-12-18 19:20:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:24,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:24,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:24,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512402192] [2021-12-18 19:20:24,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512402192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:24,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:24,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:24,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249279847] [2021-12-18 19:20:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:24,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:24,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:24,869 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:24,955 INFO L93 Difference]: Finished difference Result 222 states and 302 transitions. [2021-12-18 19:20:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:20:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:20:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:24,959 INFO L225 Difference]: With dead ends: 222 [2021-12-18 19:20:24,959 INFO L226 Difference]: Without dead ends: 222 [2021-12-18 19:20:24,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:20:24,963 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 138 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:24,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 212 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-18 19:20:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2021-12-18 19:20:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.6641221374045803) internal successors, (218), 151 states have internal predecessors, (218), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-18 19:20:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2021-12-18 19:20:24,988 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 6 [2021-12-18 19:20:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:24,989 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2021-12-18 19:20:24,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2021-12-18 19:20:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:20:24,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:24,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:24,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:20:24,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2021-12-18 19:20:24,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:24,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933752171] [2021-12-18 19:20:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:24,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:25,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933752171] [2021-12-18 19:20:25,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933752171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:25,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:25,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:25,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662146323] [2021-12-18 19:20:25,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:25,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:25,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:25,111 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:25,246 INFO L93 Difference]: Finished difference Result 260 states and 371 transitions. [2021-12-18 19:20:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:25,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:20:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:25,249 INFO L225 Difference]: With dead ends: 260 [2021-12-18 19:20:25,249 INFO L226 Difference]: Without dead ends: 260 [2021-12-18 19:20:25,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:20:25,254 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:25,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 189 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-18 19:20:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2021-12-18 19:20:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 154 states have internal predecessors, (221), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-18 19:20:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 266 transitions. [2021-12-18 19:20:25,276 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 266 transitions. Word has length 7 [2021-12-18 19:20:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:25,276 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 266 transitions. [2021-12-18 19:20:25,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 266 transitions. [2021-12-18 19:20:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:20:25,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:25,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:25,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:20:25,277 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2021-12-18 19:20:25,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:25,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732342015] [2021-12-18 19:20:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:25,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:25,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:25,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732342015] [2021-12-18 19:20:25,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732342015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:25,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:25,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:25,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128079799] [2021-12-18 19:20:25,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:25,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:25,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:25,389 INFO L87 Difference]: Start difference. First operand 172 states and 266 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:25,491 INFO L93 Difference]: Finished difference Result 224 states and 303 transitions. [2021-12-18 19:20:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:25,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 19:20:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:25,493 INFO L225 Difference]: With dead ends: 224 [2021-12-18 19:20:25,493 INFO L226 Difference]: Without dead ends: 224 [2021-12-18 19:20:25,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:20:25,493 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:25,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 208 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:25,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-18 19:20:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 172. [2021-12-18 19:20:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6343283582089552) internal successors, (219), 154 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-18 19:20:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 264 transitions. [2021-12-18 19:20:25,499 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 264 transitions. Word has length 8 [2021-12-18 19:20:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:25,499 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 264 transitions. [2021-12-18 19:20:25,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 264 transitions. [2021-12-18 19:20:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:20:25,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:25,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:25,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:20:25,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2021-12-18 19:20:25,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57998311] [2021-12-18 19:20:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:25,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:25,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:25,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57998311] [2021-12-18 19:20:25,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57998311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:25,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:25,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:25,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609006524] [2021-12-18 19:20:25,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:25,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:25,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:25,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:25,531 INFO L87 Difference]: Start difference. First operand 172 states and 264 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:25,613 INFO L93 Difference]: Finished difference Result 266 states and 366 transitions. [2021-12-18 19:20:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:20:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:25,616 INFO L225 Difference]: With dead ends: 266 [2021-12-18 19:20:25,617 INFO L226 Difference]: Without dead ends: 266 [2021-12-18 19:20:25,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:20:25,617 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:25,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-18 19:20:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2021-12-18 19:20:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 165 states have (on average 1.606060606060606) internal successors, (265), 186 states have internal predecessors, (265), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-18 19:20:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 310 transitions. [2021-12-18 19:20:25,635 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 310 transitions. Word has length 9 [2021-12-18 19:20:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:25,635 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 310 transitions. [2021-12-18 19:20:25,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 310 transitions. [2021-12-18 19:20:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:20:25,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:25,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:25,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:20:25,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2021-12-18 19:20:25,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404668384] [2021-12-18 19:20:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:25,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:25,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404668384] [2021-12-18 19:20:25,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404668384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:25,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:25,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:25,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466016838] [2021-12-18 19:20:25,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:25,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:25,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:25,682 INFO L87 Difference]: Start difference. First operand 205 states and 310 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:25,748 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2021-12-18 19:20:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:20:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:25,750 INFO L225 Difference]: With dead ends: 253 [2021-12-18 19:20:25,750 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 19:20:25,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:20:25,750 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 139 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:25,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 235 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 19:20:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 219. [2021-12-18 19:20:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 200 states have internal predecessors, (286), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-18 19:20:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 331 transitions. [2021-12-18 19:20:25,756 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 331 transitions. Word has length 10 [2021-12-18 19:20:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:25,756 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 331 transitions. [2021-12-18 19:20:25,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 331 transitions. [2021-12-18 19:20:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:20:25,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:25,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:25,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:20:25,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2021-12-18 19:20:25,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:25,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108873575] [2021-12-18 19:20:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:25,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:25,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:25,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108873575] [2021-12-18 19:20:25,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108873575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:25,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705037033] [2021-12-18 19:20:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:25,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:25,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:25,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:20:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:20:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:26,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:26,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705037033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:26,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:26,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-12-18 19:20:26,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550510708] [2021-12-18 19:20:26,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:26,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:20:26,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:20:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:20:26,174 INFO L87 Difference]: Start difference. First operand 219 states and 331 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:26,375 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2021-12-18 19:20:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:20:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:20:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:26,377 INFO L225 Difference]: With dead ends: 291 [2021-12-18 19:20:26,377 INFO L226 Difference]: Without dead ends: 291 [2021-12-18 19:20:26,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:20:26,378 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 469 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:26,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 489 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-18 19:20:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2021-12-18 19:20:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 183 states have (on average 1.540983606557377) internal successors, (282), 206 states have internal predecessors, (282), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-18 19:20:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2021-12-18 19:20:26,385 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 14 [2021-12-18 19:20:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:26,385 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2021-12-18 19:20:26,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2021-12-18 19:20:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:20:26,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:26,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:26,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 19:20:26,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:26,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2021-12-18 19:20:26,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190756906] [2021-12-18 19:20:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:26,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:26,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:26,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190756906] [2021-12-18 19:20:26,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190756906] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:26,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067324852] [2021-12-18 19:20:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:26,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:26,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:26,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:20:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:26,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 19:20:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:26,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:20:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:26,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067324852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:26,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:26,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-18 19:20:26,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073464022] [2021-12-18 19:20:26,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:26,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:20:26,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:20:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:20:26,895 INFO L87 Difference]: Start difference. First operand 225 states and 332 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:27,108 INFO L93 Difference]: Finished difference Result 336 states and 471 transitions. [2021-12-18 19:20:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:20:27,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:20:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:27,110 INFO L225 Difference]: With dead ends: 336 [2021-12-18 19:20:27,110 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 19:20:27,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:20:27,111 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 428 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:27,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 317 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:20:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 19:20:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 239. [2021-12-18 19:20:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 220 states have internal predecessors, (296), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2021-12-18 19:20:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2021-12-18 19:20:27,117 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 15 [2021-12-18 19:20:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:27,118 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2021-12-18 19:20:27,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2021-12-18 19:20:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:20:27,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:27,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:27,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-18 19:20:27,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2021-12-18 19:20:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736924385] [2021-12-18 19:20:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:27,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:27,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736924385] [2021-12-18 19:20:27,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736924385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526471754] [2021-12-18 19:20:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:27,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:27,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:27,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:20:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:20:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:27,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:20:27,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:20:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:27,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:27,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526471754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:27,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:27,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-12-18 19:20:27,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729024076] [2021-12-18 19:20:27,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:27,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 19:20:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 19:20:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:20:27,842 INFO L87 Difference]: Start difference. First operand 239 states and 353 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:28,389 INFO L93 Difference]: Finished difference Result 550 states and 739 transitions. [2021-12-18 19:20:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:20:28,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 19:20:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:28,393 INFO L225 Difference]: With dead ends: 550 [2021-12-18 19:20:28,393 INFO L226 Difference]: Without dead ends: 550 [2021-12-18 19:20:28,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:20:28,394 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 433 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:28,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1026 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:20:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-18 19:20:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-12-18 19:20:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 289 states have (on average 1.5536332179930796) internal successors, (449), 320 states have internal predecessors, (449), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2021-12-18 19:20:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2021-12-18 19:20:28,420 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 16 [2021-12-18 19:20:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:28,420 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2021-12-18 19:20:28,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2021-12-18 19:20:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:20:28,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:28,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:28,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:28,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:28,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2021-12-18 19:20:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:28,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593782676] [2021-12-18 19:20:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:28,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:28,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:28,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593782676] [2021-12-18 19:20:28,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593782676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:28,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:28,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 19:20:28,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060120098] [2021-12-18 19:20:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:28,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:20:28,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:20:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:28,666 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:28,683 INFO L93 Difference]: Finished difference Result 495 states and 752 transitions. [2021-12-18 19:20:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:20:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:20:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:28,685 INFO L225 Difference]: With dead ends: 495 [2021-12-18 19:20:28,686 INFO L226 Difference]: Without dead ends: 495 [2021-12-18 19:20:28,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:28,686 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:28,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-18 19:20:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 479. [2021-12-18 19:20:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 409 states have (on average 1.5574572127139363) internal successors, (637), 445 states have internal predecessors, (637), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2021-12-18 19:20:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 747 transitions. [2021-12-18 19:20:28,701 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 747 transitions. Word has length 18 [2021-12-18 19:20:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:28,701 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 747 transitions. [2021-12-18 19:20:28,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 747 transitions. [2021-12-18 19:20:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:20:28,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:28,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:28,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:20:28,703 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2021-12-18 19:20:28,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:28,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482778110] [2021-12-18 19:20:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:28,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:28,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482778110] [2021-12-18 19:20:28,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482778110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:28,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:28,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:20:28,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586530915] [2021-12-18 19:20:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:28,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:20:28,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:20:28,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:28,745 INFO L87 Difference]: Start difference. First operand 479 states and 747 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:28,750 INFO L93 Difference]: Finished difference Result 441 states and 681 transitions. [2021-12-18 19:20:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:20:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:20:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:28,753 INFO L225 Difference]: With dead ends: 441 [2021-12-18 19:20:28,753 INFO L226 Difference]: Without dead ends: 441 [2021-12-18 19:20:28,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:28,754 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:28,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-12-18 19:20:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2021-12-18 19:20:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 377 states have (on average 1.5145888594164456) internal successors, (571), 407 states have internal predecessors, (571), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2021-12-18 19:20:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 681 transitions. [2021-12-18 19:20:28,767 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 681 transitions. Word has length 18 [2021-12-18 19:20:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:28,767 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 681 transitions. [2021-12-18 19:20:28,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 681 transitions. [2021-12-18 19:20:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:20:28,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:28,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:28,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:20:28,769 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2021-12-18 19:20:28,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777495634] [2021-12-18 19:20:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:28,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:28,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777495634] [2021-12-18 19:20:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777495634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:28,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:28,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 19:20:28,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348224760] [2021-12-18 19:20:28,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:20:28,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:20:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:28,816 INFO L87 Difference]: Start difference. First operand 441 states and 681 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:28,840 INFO L93 Difference]: Finished difference Result 509 states and 761 transitions. [2021-12-18 19:20:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:20:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-18 19:20:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:28,844 INFO L225 Difference]: With dead ends: 509 [2021-12-18 19:20:28,844 INFO L226 Difference]: Without dead ends: 509 [2021-12-18 19:20:28,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:20:28,845 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:28,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-18 19:20:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 491. [2021-12-18 19:20:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 424 states have (on average 1.5047169811320755) internal successors, (638), 455 states have internal predecessors, (638), 20 states have call successors, (20), 15 states have call predecessors, (20), 32 states have return successors, (94), 20 states have call predecessors, (94), 20 states have call successors, (94) [2021-12-18 19:20:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 752 transitions. [2021-12-18 19:20:28,858 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 752 transitions. Word has length 19 [2021-12-18 19:20:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:28,859 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 752 transitions. [2021-12-18 19:20:28,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 752 transitions. [2021-12-18 19:20:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:20:28,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:28,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:28,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 19:20:28,863 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2021-12-18 19:20:28,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:28,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235156157] [2021-12-18 19:20:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:28,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:28,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235156157] [2021-12-18 19:20:28,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235156157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:28,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:28,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:20:28,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359115911] [2021-12-18 19:20:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:28,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:20:28,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:20:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:20:28,897 INFO L87 Difference]: Start difference. First operand 491 states and 752 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:28,938 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2021-12-18 19:20:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:20:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-18 19:20:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:28,940 INFO L225 Difference]: With dead ends: 351 [2021-12-18 19:20:28,940 INFO L226 Difference]: Without dead ends: 351 [2021-12-18 19:20:28,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:20:28,941 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:28,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-18 19:20:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2021-12-18 19:20:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 299 states have (on average 1.4782608695652173) internal successors, (442), 324 states have internal predecessors, (442), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2021-12-18 19:20:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 521 transitions. [2021-12-18 19:20:28,948 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 521 transitions. Word has length 25 [2021-12-18 19:20:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:28,948 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 521 transitions. [2021-12-18 19:20:28,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 521 transitions. [2021-12-18 19:20:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:20:28,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:28,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:28,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:20:28,949 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2021-12-18 19:20:28,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144917633] [2021-12-18 19:20:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:28,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:29,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:29,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144917633] [2021-12-18 19:20:29,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144917633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026303751] [2021-12-18 19:20:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:29,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:29,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:29,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:20:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:20:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:29,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:29,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026303751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:29,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:29,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-18 19:20:29,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75188396] [2021-12-18 19:20:29,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:29,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 19:20:29,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 19:20:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:20:29,563 INFO L87 Difference]: Start difference. First operand 351 states and 521 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:30,105 INFO L93 Difference]: Finished difference Result 531 states and 739 transitions. [2021-12-18 19:20:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:20:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-12-18 19:20:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:30,108 INFO L225 Difference]: With dead ends: 531 [2021-12-18 19:20:30,108 INFO L226 Difference]: Without dead ends: 531 [2021-12-18 19:20:30,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:20:30,108 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 498 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:30,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 376 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2021-12-18 19:20:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-18 19:20:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 452. [2021-12-18 19:20:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 391 states have (on average 1.4757033248081841) internal successors, (577), 420 states have internal predecessors, (577), 17 states have call successors, (17), 14 states have call predecessors, (17), 29 states have return successors, (72), 17 states have call predecessors, (72), 17 states have call successors, (72) [2021-12-18 19:20:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 666 transitions. [2021-12-18 19:20:30,117 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 666 transitions. Word has length 27 [2021-12-18 19:20:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:30,117 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 666 transitions. [2021-12-18 19:20:30,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 666 transitions. [2021-12-18 19:20:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 19:20:30,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:30,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:30,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:30,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:30,331 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2021-12-18 19:20:30,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:30,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816691843] [2021-12-18 19:20:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:30,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:30,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:30,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:30,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816691843] [2021-12-18 19:20:30,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816691843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:30,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892939312] [2021-12-18 19:20:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:30,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:30,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:30,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:20:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:20:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:30,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:20:30,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892939312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:30,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:20:30,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2021-12-18 19:20:30,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417688830] [2021-12-18 19:20:30,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:30,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:20:30,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:20:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:20:30,626 INFO L87 Difference]: Start difference. First operand 452 states and 666 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:30,708 INFO L93 Difference]: Finished difference Result 566 states and 816 transitions. [2021-12-18 19:20:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:20:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-18 19:20:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:30,711 INFO L225 Difference]: With dead ends: 566 [2021-12-18 19:20:30,711 INFO L226 Difference]: Without dead ends: 566 [2021-12-18 19:20:30,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:20:30,711 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 138 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:30,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 164 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-18 19:20:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 473. [2021-12-18 19:20:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 416 states have (on average 1.4615384615384615) internal successors, (608), 441 states have internal predecessors, (608), 17 states have call successors, (17), 14 states have call predecessors, (17), 25 states have return successors, (68), 17 states have call predecessors, (68), 17 states have call successors, (68) [2021-12-18 19:20:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 693 transitions. [2021-12-18 19:20:30,722 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 693 transitions. Word has length 28 [2021-12-18 19:20:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:30,722 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 693 transitions. [2021-12-18 19:20:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 693 transitions. [2021-12-18 19:20:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:20:30,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:30,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:30,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:30,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 19:20:30,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:30,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2021-12-18 19:20:30,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665853593] [2021-12-18 19:20:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:30,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:31,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:31,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665853593] [2021-12-18 19:20:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665853593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266431269] [2021-12-18 19:20:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:31,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:31,245 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:31,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:20:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 19:20:31,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:31,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:31,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:31,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266431269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:31,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:31,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-12-18 19:20:31,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238480613] [2021-12-18 19:20:31,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:31,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 19:20:31,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 19:20:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:20:31,806 INFO L87 Difference]: Start difference. First operand 473 states and 693 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:33,235 INFO L93 Difference]: Finished difference Result 798 states and 1074 transitions. [2021-12-18 19:20:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:20:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-18 19:20:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:33,239 INFO L225 Difference]: With dead ends: 798 [2021-12-18 19:20:33,239 INFO L226 Difference]: Without dead ends: 798 [2021-12-18 19:20:33,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=542, Invalid=2110, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:20:33,240 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 966 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:33,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 366 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 719 Invalid, 0 Unknown, 227 Unchecked, 0.5s Time] [2021-12-18 19:20:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-18 19:20:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 628. [2021-12-18 19:20:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 562 states have (on average 1.4750889679715302) internal successors, (829), 590 states have internal predecessors, (829), 20 states have call successors, (20), 17 states have call predecessors, (20), 31 states have return successors, (79), 20 states have call predecessors, (79), 20 states have call successors, (79) [2021-12-18 19:20:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 928 transitions. [2021-12-18 19:20:33,252 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 928 transitions. Word has length 29 [2021-12-18 19:20:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 928 transitions. [2021-12-18 19:20:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 928 transitions. [2021-12-18 19:20:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:20:33,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:33,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:33,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 19:20:33,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1182683565, now seen corresponding path program 1 times [2021-12-18 19:20:33,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:33,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751787145] [2021-12-18 19:20:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:33,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:33,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:33,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751787145] [2021-12-18 19:20:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751787145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:33,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:20:33,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:20:33,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351443611] [2021-12-18 19:20:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:20:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:20:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:20:33,523 INFO L87 Difference]: Start difference. First operand 628 states and 928 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:33,648 INFO L93 Difference]: Finished difference Result 535 states and 758 transitions. [2021-12-18 19:20:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:20:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-18 19:20:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:33,650 INFO L225 Difference]: With dead ends: 535 [2021-12-18 19:20:33,650 INFO L226 Difference]: Without dead ends: 534 [2021-12-18 19:20:33,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:20:33,651 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 118 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:33,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 128 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:33,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-18 19:20:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 517. [2021-12-18 19:20:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 461 states have (on average 1.4598698481561823) internal successors, (673), 489 states have internal predecessors, (673), 15 states have call successors, (15), 12 states have call predecessors, (15), 26 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 19:20:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 742 transitions. [2021-12-18 19:20:33,660 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 742 transitions. Word has length 30 [2021-12-18 19:20:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:33,660 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 742 transitions. [2021-12-18 19:20:33,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 742 transitions. [2021-12-18 19:20:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:20:33,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:33,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:33,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 19:20:33,661 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2021-12-18 19:20:33,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996578214] [2021-12-18 19:20:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:33,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:33,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:33,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996578214] [2021-12-18 19:20:33,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996578214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848475664] [2021-12-18 19:20:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:33,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:33,730 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:33,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:20:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:33,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:20:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:33,888 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:33,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:33,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:33,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848475664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:33,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:33,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-12-18 19:20:33,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357494500] [2021-12-18 19:20:33,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:33,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 19:20:33,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 19:20:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:20:33,981 INFO L87 Difference]: Start difference. First operand 517 states and 742 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:20:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:34,223 INFO L93 Difference]: Finished difference Result 630 states and 848 transitions. [2021-12-18 19:20:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:20:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-18 19:20:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:34,225 INFO L225 Difference]: With dead ends: 630 [2021-12-18 19:20:34,225 INFO L226 Difference]: Without dead ends: 630 [2021-12-18 19:20:34,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:20:34,226 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 297 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:34,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 168 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-18 19:20:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-12-18 19:20:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 568. [2021-12-18 19:20:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 510 states have (on average 1.4313725490196079) internal successors, (730), 538 states have internal predecessors, (730), 15 states have call successors, (15), 14 states have call predecessors, (15), 28 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 19:20:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 799 transitions. [2021-12-18 19:20:34,236 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 799 transitions. Word has length 30 [2021-12-18 19:20:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:34,236 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 799 transitions. [2021-12-18 19:20:34,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:20:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 799 transitions. [2021-12-18 19:20:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 19:20:34,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:34,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:34,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:34,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:34,437 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2021-12-18 19:20:34,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:34,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866309661] [2021-12-18 19:20:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:34,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:34,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:34,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866309661] [2021-12-18 19:20:34,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866309661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:34,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492045330] [2021-12-18 19:20:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:34,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:34,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:34,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:34,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:20:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:20:34,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:34,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:34,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492045330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:34,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:34,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-12-18 19:20:34,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862866404] [2021-12-18 19:20:34,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:20:34,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:20:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:20:34,915 INFO L87 Difference]: Start difference. First operand 568 states and 799 transitions. Second operand has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:35,355 INFO L93 Difference]: Finished difference Result 712 states and 930 transitions. [2021-12-18 19:20:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:20:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-12-18 19:20:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:35,357 INFO L225 Difference]: With dead ends: 712 [2021-12-18 19:20:35,357 INFO L226 Difference]: Without dead ends: 712 [2021-12-18 19:20:35,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:20:35,358 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 379 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:35,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 254 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 389 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-12-18 19:20:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-18 19:20:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 637. [2021-12-18 19:20:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 575 states have (on average 1.4191304347826086) internal successors, (816), 606 states have internal predecessors, (816), 15 states have call successors, (15), 15 states have call predecessors, (15), 32 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 19:20:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 885 transitions. [2021-12-18 19:20:35,371 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 885 transitions. Word has length 31 [2021-12-18 19:20:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:35,371 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 885 transitions. [2021-12-18 19:20:35,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 885 transitions. [2021-12-18 19:20:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 19:20:35,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:35,372 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:35,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:35,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:35,584 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2021-12-18 19:20:35,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:35,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382726048] [2021-12-18 19:20:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:35,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:35,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:35,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382726048] [2021-12-18 19:20:35,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382726048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067244295] [2021-12-18 19:20:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:35,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:35,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:35,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:35,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:20:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 19:20:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:36,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:36,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:36,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067244295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:36,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:36,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-18 19:20:36,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222539801] [2021-12-18 19:20:36,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:36,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:20:36,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:36,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:20:36,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:20:36,295 INFO L87 Difference]: Start difference. First operand 637 states and 885 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:37,024 INFO L93 Difference]: Finished difference Result 670 states and 889 transitions. [2021-12-18 19:20:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:20:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-18 19:20:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:37,027 INFO L225 Difference]: With dead ends: 670 [2021-12-18 19:20:37,027 INFO L226 Difference]: Without dead ends: 670 [2021-12-18 19:20:37,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:20:37,029 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 452 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:37,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 281 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 512 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-12-18 19:20:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-12-18 19:20:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 637. [2021-12-18 19:20:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 575 states have (on average 1.3965217391304348) internal successors, (803), 606 states have internal predecessors, (803), 15 states have call successors, (15), 15 states have call predecessors, (15), 32 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2021-12-18 19:20:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 872 transitions. [2021-12-18 19:20:37,042 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 872 transitions. Word has length 35 [2021-12-18 19:20:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:37,043 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 872 transitions. [2021-12-18 19:20:37,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 872 transitions. [2021-12-18 19:20:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 19:20:37,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:37,043 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:37,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:37,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:37,280 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2021-12-18 19:20:37,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:37,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88271854] [2021-12-18 19:20:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:37,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:37,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:20:37,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88271854] [2021-12-18 19:20:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88271854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528654558] [2021-12-18 19:20:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:37,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:37,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:37,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:20:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:37,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:20:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:37,616 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:20:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:20:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:20:37,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 19:20:37,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 19:20:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:20:37,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528654558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:37,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:37,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2021-12-18 19:20:37,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432947201] [2021-12-18 19:20:37,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:37,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:20:37,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:20:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:20:37,939 INFO L87 Difference]: Start difference. First operand 637 states and 872 transitions. Second operand has 18 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 19:20:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:38,309 INFO L93 Difference]: Finished difference Result 704 states and 926 transitions. [2021-12-18 19:20:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:20:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-18 19:20:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:38,312 INFO L225 Difference]: With dead ends: 704 [2021-12-18 19:20:38,312 INFO L226 Difference]: Without dead ends: 704 [2021-12-18 19:20:38,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:20:38,313 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 524 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:38,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 172 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 320 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2021-12-18 19:20:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-18 19:20:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 645. [2021-12-18 19:20:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 586 states have (on average 1.3976109215017065) internal successors, (819), 614 states have internal predecessors, (819), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2021-12-18 19:20:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 882 transitions. [2021-12-18 19:20:38,326 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 882 transitions. Word has length 36 [2021-12-18 19:20:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 882 transitions. [2021-12-18 19:20:38,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.25) internal successors, (84), 15 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 19:20:38,327 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 882 transitions. [2021-12-18 19:20:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 19:20:38,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:38,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:38,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-18 19:20:38,538 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 45027747, now seen corresponding path program 1 times [2021-12-18 19:20:38,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442592413] [2021-12-18 19:20:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:38,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:38,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:38,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442592413] [2021-12-18 19:20:38,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442592413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79593287] [2021-12-18 19:20:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:38,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:38,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:38,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:38,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:20:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:20:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:39,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 19:20:39,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:39,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79593287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:39,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:39,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-12-18 19:20:39,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814808929] [2021-12-18 19:20:39,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:39,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:20:39,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:20:39,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:20:39,287 INFO L87 Difference]: Start difference. First operand 645 states and 882 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:40,319 INFO L93 Difference]: Finished difference Result 544 states and 679 transitions. [2021-12-18 19:20:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:20:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-18 19:20:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:40,321 INFO L225 Difference]: With dead ends: 544 [2021-12-18 19:20:40,321 INFO L226 Difference]: Without dead ends: 544 [2021-12-18 19:20:40,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:20:40,322 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 653 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:40,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 368 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 732 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2021-12-18 19:20:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-18 19:20:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 429. [2021-12-18 19:20:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 386 states have (on average 1.3860103626943006) internal successors, (535), 408 states have internal predecessors, (535), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 19:20:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 572 transitions. [2021-12-18 19:20:40,330 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 572 transitions. Word has length 37 [2021-12-18 19:20:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:40,330 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 572 transitions. [2021-12-18 19:20:40,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 572 transitions. [2021-12-18 19:20:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 19:20:40,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:40,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:40,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:40,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-18 19:20:40,544 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2021-12-18 19:20:40,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189134349] [2021-12-18 19:20:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:40,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:40,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:40,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189134349] [2021-12-18 19:20:40,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189134349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:40,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841369591] [2021-12-18 19:20:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:40,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:40,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:40,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:40,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:20:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:20:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:40,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:40,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841369591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:40,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:40,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-18 19:20:40,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344894859] [2021-12-18 19:20:40,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:40,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:40,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:40,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:40,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:40,756 INFO L87 Difference]: Start difference. First operand 429 states and 572 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:40,810 INFO L93 Difference]: Finished difference Result 448 states and 585 transitions. [2021-12-18 19:20:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-18 19:20:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:40,812 INFO L225 Difference]: With dead ends: 448 [2021-12-18 19:20:40,812 INFO L226 Difference]: Without dead ends: 448 [2021-12-18 19:20:40,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:20:40,812 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:40,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-18 19:20:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 426. [2021-12-18 19:20:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 385 states have (on average 1.3662337662337662) internal successors, (526), 405 states have internal predecessors, (526), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 19:20:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 563 transitions. [2021-12-18 19:20:40,818 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 563 transitions. Word has length 40 [2021-12-18 19:20:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:40,818 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 563 transitions. [2021-12-18 19:20:40,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 563 transitions. [2021-12-18 19:20:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:20:40,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:40,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:40,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:41,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-18 19:20:41,035 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2021-12-18 19:20:41,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:41,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771808786] [2021-12-18 19:20:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:41,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:41,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:41,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771808786] [2021-12-18 19:20:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771808786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884786463] [2021-12-18 19:20:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:41,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:41,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:41,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:20:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:41,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:20:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:41,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:41,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884786463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:41,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:41,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-18 19:20:41,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093561524] [2021-12-18 19:20:41,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:41,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:41,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:20:41,303 INFO L87 Difference]: Start difference. First operand 426 states and 563 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:41,359 INFO L93 Difference]: Finished difference Result 445 states and 575 transitions. [2021-12-18 19:20:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-18 19:20:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:41,363 INFO L225 Difference]: With dead ends: 445 [2021-12-18 19:20:41,363 INFO L226 Difference]: Without dead ends: 445 [2021-12-18 19:20:41,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:20:41,363 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:41,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-18 19:20:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 424. [2021-12-18 19:20:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 403 states have internal predecessors, (517), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 19:20:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 554 transitions. [2021-12-18 19:20:41,369 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 554 transitions. Word has length 41 [2021-12-18 19:20:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:41,369 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 554 transitions. [2021-12-18 19:20:41,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 554 transitions. [2021-12-18 19:20:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 19:20:41,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:41,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:41,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:41,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-18 19:20:41,588 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2021-12-18 19:20:41,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:41,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052783636] [2021-12-18 19:20:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:41,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:41,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:41,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052783636] [2021-12-18 19:20:41,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052783636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7732324] [2021-12-18 19:20:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:41,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:41,626 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:20:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:20:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:41,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:20:41,752 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:41,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:41,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7732324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:41,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:41,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-18 19:20:41,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311742290] [2021-12-18 19:20:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:41,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:20:41,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:20:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:20:41,944 INFO L87 Difference]: Start difference. First operand 424 states and 554 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:20:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:42,036 INFO L93 Difference]: Finished difference Result 460 states and 578 transitions. [2021-12-18 19:20:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:20:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-12-18 19:20:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:42,038 INFO L225 Difference]: With dead ends: 460 [2021-12-18 19:20:42,038 INFO L226 Difference]: Without dead ends: 460 [2021-12-18 19:20:42,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:20:42,039 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 83 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:42,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 107 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2021-12-18 19:20:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-18 19:20:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 430. [2021-12-18 19:20:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 391 states have (on average 1.3248081841432224) internal successors, (518), 409 states have internal predecessors, (518), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 19:20:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 555 transitions. [2021-12-18 19:20:42,046 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 555 transitions. Word has length 42 [2021-12-18 19:20:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:42,046 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 555 transitions. [2021-12-18 19:20:42,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:20:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 555 transitions. [2021-12-18 19:20:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 19:20:42,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:42,047 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:42,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:42,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:42,263 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1366889029, now seen corresponding path program 1 times [2021-12-18 19:20:42,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:42,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856717656] [2021-12-18 19:20:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:42,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:42,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856717656] [2021-12-18 19:20:42,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856717656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:42,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138531280] [2021-12-18 19:20:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:42,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:42,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:42,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:20:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:20:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:42,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:20:42,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138531280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:42,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:20:42,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-18 19:20:42,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231041843] [2021-12-18 19:20:42,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:42,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:20:42,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:20:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:20:42,423 INFO L87 Difference]: Start difference. First operand 430 states and 555 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:42,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:42,449 INFO L93 Difference]: Finished difference Result 489 states and 604 transitions. [2021-12-18 19:20:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:20:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-18 19:20:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:42,451 INFO L225 Difference]: With dead ends: 489 [2021-12-18 19:20:42,451 INFO L226 Difference]: Without dead ends: 489 [2021-12-18 19:20:42,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:20:42,452 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 66 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:42,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 177 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-18 19:20:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 420. [2021-12-18 19:20:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 381 states have (on average 1.2939632545931758) internal successors, (493), 399 states have internal predecessors, (493), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-18 19:20:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 530 transitions. [2021-12-18 19:20:42,459 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 530 transitions. Word has length 45 [2021-12-18 19:20:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:42,460 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 530 transitions. [2021-12-18 19:20:42,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:20:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 530 transitions. [2021-12-18 19:20:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 19:20:42,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:42,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:42,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:42,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 19:20:42,679 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash -624108164, now seen corresponding path program 1 times [2021-12-18 19:20:42,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:42,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122996541] [2021-12-18 19:20:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:42,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:42,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122996541] [2021-12-18 19:20:42,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122996541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39568564] [2021-12-18 19:20:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:42,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:42,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:42,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:42,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:20:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:42,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:20:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:42,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:43,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39568564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:43,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:43,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2021-12-18 19:20:43,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301304506] [2021-12-18 19:20:43,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:43,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:20:43,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:20:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:20:43,017 INFO L87 Difference]: Start difference. First operand 420 states and 530 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:43,154 INFO L93 Difference]: Finished difference Result 339 states and 404 transitions. [2021-12-18 19:20:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:20:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-18 19:20:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:43,155 INFO L225 Difference]: With dead ends: 339 [2021-12-18 19:20:43,156 INFO L226 Difference]: Without dead ends: 339 [2021-12-18 19:20:43,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:20:43,156 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 120 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:43,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 130 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-18 19:20:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 324. [2021-12-18 19:20:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 292 states have (on average 1.2568493150684932) internal successors, (367), 307 states have internal predecessors, (367), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-18 19:20:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 392 transitions. [2021-12-18 19:20:43,160 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 392 transitions. Word has length 48 [2021-12-18 19:20:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:43,160 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 392 transitions. [2021-12-18 19:20:43,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:20:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 392 transitions. [2021-12-18 19:20:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 19:20:43,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:43,160 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:43,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:43,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 19:20:43,375 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2021-12-18 19:20:43,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752567541] [2021-12-18 19:20:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:43,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:43,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:43,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 19:20:43,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752567541] [2021-12-18 19:20:43,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752567541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074489605] [2021-12-18 19:20:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:43,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:43,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:43,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:43,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:20:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:20:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:43,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074489605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:43,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:43,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-18 19:20:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513820358] [2021-12-18 19:20:43,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:43,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 19:20:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 19:20:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:20:43,996 INFO L87 Difference]: Start difference. First operand 324 states and 392 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:20:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:44,392 INFO L93 Difference]: Finished difference Result 352 states and 406 transitions. [2021-12-18 19:20:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:20:44,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-12-18 19:20:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:44,393 INFO L225 Difference]: With dead ends: 352 [2021-12-18 19:20:44,393 INFO L226 Difference]: Without dead ends: 352 [2021-12-18 19:20:44,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:20:44,394 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 278 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:44,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 271 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 328 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-18 19:20:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-18 19:20:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 323. [2021-12-18 19:20:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2465753424657535) internal successors, (364), 306 states have internal predecessors, (364), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 387 transitions. [2021-12-18 19:20:44,408 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 387 transitions. Word has length 48 [2021-12-18 19:20:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:44,408 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 387 transitions. [2021-12-18 19:20:44,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:20:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 387 transitions. [2021-12-18 19:20:44,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:20:44,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:44,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:44,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:44,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:20:44,621 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2021-12-18 19:20:44,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575206872] [2021-12-18 19:20:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:44,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:44,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:20:44,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575206872] [2021-12-18 19:20:44,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575206872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293880137] [2021-12-18 19:20:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:44,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:44,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:44,952 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:44,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:20:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:20:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:45,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:45,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:45,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293880137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:45,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:45,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 22 [2021-12-18 19:20:45,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829722495] [2021-12-18 19:20:45,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:45,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:20:45,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:45,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:20:45,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:20:45,735 INFO L87 Difference]: Start difference. First operand 323 states and 387 transitions. Second operand has 24 states, 22 states have (on average 3.409090909090909) internal successors, (75), 19 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:20:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:46,716 INFO L93 Difference]: Finished difference Result 359 states and 407 transitions. [2021-12-18 19:20:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:20:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.409090909090909) internal successors, (75), 19 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2021-12-18 19:20:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:46,718 INFO L225 Difference]: With dead ends: 359 [2021-12-18 19:20:46,718 INFO L226 Difference]: Without dead ends: 359 [2021-12-18 19:20:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:20:46,718 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 414 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:46,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 300 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 533 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2021-12-18 19:20:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-18 19:20:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 323. [2021-12-18 19:20:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2431506849315068) internal successors, (363), 306 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 386 transitions. [2021-12-18 19:20:46,722 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 386 transitions. Word has length 50 [2021-12-18 19:20:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:46,722 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 386 transitions. [2021-12-18 19:20:46,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.409090909090909) internal successors, (75), 19 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:20:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 386 transitions. [2021-12-18 19:20:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:20:46,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:46,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:46,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:46,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 19:20:46,935 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2021-12-18 19:20:46,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382214302] [2021-12-18 19:20:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:46,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:46,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:47,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382214302] [2021-12-18 19:20:47,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382214302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339153657] [2021-12-18 19:20:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:47,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:47,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:47,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:20:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:20:47,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:47,214 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:20:47,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:20:47,312 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:47,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:47,343 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:20:47,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:20:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:47,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:47,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:47,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2021-12-18 19:20:47,625 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:47,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2021-12-18 19:20:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:47,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339153657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:47,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:47,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 26 [2021-12-18 19:20:47,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470163835] [2021-12-18 19:20:47,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:47,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 19:20:47,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 19:20:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:20:47,781 INFO L87 Difference]: Start difference. First operand 323 states and 386 transitions. Second operand has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 19:20:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:47,971 INFO L93 Difference]: Finished difference Result 336 states and 398 transitions. [2021-12-18 19:20:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:20:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2021-12-18 19:20:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:47,972 INFO L225 Difference]: With dead ends: 336 [2021-12-18 19:20:47,972 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 19:20:47,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:20:47,973 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 362 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:47,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 100 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 256 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-18 19:20:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 19:20:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-12-18 19:20:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2363013698630136) internal successors, (361), 305 states have internal predecessors, (361), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 384 transitions. [2021-12-18 19:20:47,977 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 384 transitions. Word has length 51 [2021-12-18 19:20:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:47,977 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 384 transitions. [2021-12-18 19:20:47,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-18 19:20:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 384 transitions. [2021-12-18 19:20:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:20:47,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:47,978 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:47,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:48,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:48,194 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2021-12-18 19:20:48,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451464850] [2021-12-18 19:20:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:48,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:48,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451464850] [2021-12-18 19:20:48,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451464850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900302579] [2021-12-18 19:20:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:48,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:48,271 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:48,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:20:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 19:20:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:48,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-18 19:20:48,458 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:20:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:20:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:48,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:20:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900302579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:20:48,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:20:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-12-18 19:20:48,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596194494] [2021-12-18 19:20:48,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:20:48,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:20:48,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:20:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:20:48,512 INFO L87 Difference]: Start difference. First operand 322 states and 384 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:20:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:48,611 INFO L93 Difference]: Finished difference Result 372 states and 430 transitions. [2021-12-18 19:20:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:20:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-12-18 19:20:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:48,613 INFO L225 Difference]: With dead ends: 372 [2021-12-18 19:20:48,613 INFO L226 Difference]: Without dead ends: 372 [2021-12-18 19:20:48,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:20:48,613 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:48,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 64 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:20:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-18 19:20:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 322. [2021-12-18 19:20:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.226027397260274) internal successors, (358), 305 states have internal predecessors, (358), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 381 transitions. [2021-12-18 19:20:48,618 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 381 transitions. Word has length 51 [2021-12-18 19:20:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:48,618 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 381 transitions. [2021-12-18 19:20:48,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:20:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 381 transitions. [2021-12-18 19:20:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:20:48,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:48,619 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:48,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-18 19:20:48,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-18 19:20:48,828 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2021-12-18 19:20:48,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:48,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392447016] [2021-12-18 19:20:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:48,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:48,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392447016] [2021-12-18 19:20:48,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392447016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483703342] [2021-12-18 19:20:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:48,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:48,901 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:48,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:20:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:20:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:49,047 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:49,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:49,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:49,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483703342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:49,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:49,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-12-18 19:20:49,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394167672] [2021-12-18 19:20:49,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:20:49,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:20:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:20:49,224 INFO L87 Difference]: Start difference. First operand 322 states and 381 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 19:20:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:49,438 INFO L93 Difference]: Finished difference Result 344 states and 397 transitions. [2021-12-18 19:20:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:20:49,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-18 19:20:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:49,439 INFO L225 Difference]: With dead ends: 344 [2021-12-18 19:20:49,439 INFO L226 Difference]: Without dead ends: 344 [2021-12-18 19:20:49,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:20:49,440 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:49,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 148 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 210 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-18 19:20:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-18 19:20:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-12-18 19:20:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2191780821917808) internal successors, (356), 305 states have internal predecessors, (356), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 379 transitions. [2021-12-18 19:20:49,444 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 379 transitions. Word has length 51 [2021-12-18 19:20:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:49,444 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 379 transitions. [2021-12-18 19:20:49,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 19:20:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 379 transitions. [2021-12-18 19:20:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:20:49,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:49,444 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:49,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:49,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:49,647 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2001887703, now seen corresponding path program 2 times [2021-12-18 19:20:49,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:49,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124473421] [2021-12-18 19:20:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:49,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:49,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:49,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:49,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124473421] [2021-12-18 19:20:49,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124473421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:49,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462300299] [2021-12-18 19:20:49,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:49,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:49,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:49,715 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:49,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:20:49,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:20:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:49,903 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:49,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:49,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462300299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:49,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:49,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-12-18 19:20:49,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873756294] [2021-12-18 19:20:49,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:49,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:20:49,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:20:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:20:49,979 INFO L87 Difference]: Start difference. First operand 322 states and 379 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 19:20:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:50,208 INFO L93 Difference]: Finished difference Result 343 states and 392 transitions. [2021-12-18 19:20:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:20:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-18 19:20:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:50,209 INFO L225 Difference]: With dead ends: 343 [2021-12-18 19:20:50,209 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 19:20:50,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:20:50,210 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 184 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:50,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 151 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-18 19:20:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 19:20:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 322. [2021-12-18 19:20:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 305 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 378 transitions. [2021-12-18 19:20:50,214 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 378 transitions. Word has length 51 [2021-12-18 19:20:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:50,214 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 378 transitions. [2021-12-18 19:20:50,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 19:20:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 378 transitions. [2021-12-18 19:20:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:20:50,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:50,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:50,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:50,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:50,431 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2021-12-18 19:20:50,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:50,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967305530] [2021-12-18 19:20:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:50,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:50,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:50,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967305530] [2021-12-18 19:20:50,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967305530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384637285] [2021-12-18 19:20:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:50,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:50,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:50,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:20:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:50,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:20:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:51,029 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:20:51,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:20:51,263 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-18 19:20:51,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-18 19:20:51,311 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 19:20:51,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-18 19:20:51,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:51,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:51,565 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 19:20:51,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 165 [2021-12-18 19:20:51,819 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-12-18 19:20:51,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2021-12-18 19:20:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:52,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384637285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:52,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:52,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2021-12-18 19:20:52,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815441537] [2021-12-18 19:20:52,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:52,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:20:52,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:20:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:20:52,118 INFO L87 Difference]: Start difference. First operand 322 states and 378 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 19:20:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:52,769 INFO L93 Difference]: Finished difference Result 374 states and 429 transitions. [2021-12-18 19:20:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:20:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-12-18 19:20:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:52,771 INFO L225 Difference]: With dead ends: 374 [2021-12-18 19:20:52,771 INFO L226 Difference]: Without dead ends: 374 [2021-12-18 19:20:52,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=2551, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:20:52,772 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 681 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:52,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 218 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 721 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2021-12-18 19:20:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-18 19:20:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 322. [2021-12-18 19:20:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2089041095890412) internal successors, (353), 305 states have internal predecessors, (353), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 376 transitions. [2021-12-18 19:20:52,777 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 376 transitions. Word has length 52 [2021-12-18 19:20:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 376 transitions. [2021-12-18 19:20:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 19:20:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 376 transitions. [2021-12-18 19:20:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:20:52,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:52,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:52,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:52,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:52,995 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2021-12-18 19:20:52,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:52,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494046799] [2021-12-18 19:20:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:52,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 19:20:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494046799] [2021-12-18 19:20:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494046799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741625573] [2021-12-18 19:20:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:53,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:53,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:53,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:20:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:20:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:53,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 19:20:53,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:53,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741625573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:53,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:53,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-12-18 19:20:53,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777516636] [2021-12-18 19:20:53,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:53,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:20:53,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:20:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:20:53,552 INFO L87 Difference]: Start difference. First operand 322 states and 376 transitions. Second operand has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:53,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:53,901 INFO L93 Difference]: Finished difference Result 353 states and 396 transitions. [2021-12-18 19:20:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:20:53,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2021-12-18 19:20:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:53,903 INFO L225 Difference]: With dead ends: 353 [2021-12-18 19:20:53,903 INFO L226 Difference]: Without dead ends: 353 [2021-12-18 19:20:53,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:20:53,903 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 339 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:53,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 243 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 328 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-12-18 19:20:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-18 19:20:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 322. [2021-12-18 19:20:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 305 states have internal predecessors, (347), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 370 transitions. [2021-12-18 19:20:53,907 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 370 transitions. Word has length 52 [2021-12-18 19:20:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:53,907 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 370 transitions. [2021-12-18 19:20:53,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:20:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 370 transitions. [2021-12-18 19:20:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:20:53,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:53,908 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:53,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-18 19:20:54,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:54,124 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:54,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2021-12-18 19:20:54,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:54,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645893520] [2021-12-18 19:20:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:54,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:54,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-18 19:20:54,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:54,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645893520] [2021-12-18 19:20:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645893520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:54,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958204195] [2021-12-18 19:20:54,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:54,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:54,214 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:54,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:20:54,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:54,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 19:20:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:54,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:20:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:20:54,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:54,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958204195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:54,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:54,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-12-18 19:20:54,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027033768] [2021-12-18 19:20:54,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:54,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:20:54,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:20:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:20:54,602 INFO L87 Difference]: Start difference. First operand 322 states and 370 transitions. Second operand has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:20:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:54,934 INFO L93 Difference]: Finished difference Result 349 states and 390 transitions. [2021-12-18 19:20:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:20:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-12-18 19:20:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:54,935 INFO L225 Difference]: With dead ends: 349 [2021-12-18 19:20:54,935 INFO L226 Difference]: Without dead ends: 349 [2021-12-18 19:20:54,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:20:54,936 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 237 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:54,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 294 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 225 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-18 19:20:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-18 19:20:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 322. [2021-12-18 19:20:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1815068493150684) internal successors, (345), 305 states have internal predecessors, (345), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 368 transitions. [2021-12-18 19:20:54,939 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 368 transitions. Word has length 52 [2021-12-18 19:20:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:54,940 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 368 transitions. [2021-12-18 19:20:54,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:20:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 368 transitions. [2021-12-18 19:20:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 19:20:54,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:54,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:54,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-18 19:20:55,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-18 19:20:55,162 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1447729377, now seen corresponding path program 1 times [2021-12-18 19:20:55,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:55,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280262635] [2021-12-18 19:20:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:55,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:55,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:55,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:55,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280262635] [2021-12-18 19:20:55,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280262635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348825017] [2021-12-18 19:20:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:55,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:55,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:55,626 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:55,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:20:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:20:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:55,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:20:55,948 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 19:20:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-18 19:20:56,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 19:20:56,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:20:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:56,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:56,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:56,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-18 19:20:56,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-18 19:20:56,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:56,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2021-12-18 19:20:56,579 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:56,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 19:20:56,616 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-18 19:20:56,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-12-18 19:20:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348825017] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:56,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:56,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 10] total 37 [2021-12-18 19:20:56,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607049970] [2021-12-18 19:20:56,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:56,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:20:56,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:20:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 19:20:56,671 INFO L87 Difference]: Start difference. First operand 322 states and 368 transitions. Second operand has 38 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 34 states have internal predecessors, (143), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 19:20:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:57,715 INFO L93 Difference]: Finished difference Result 379 states and 424 transitions. [2021-12-18 19:20:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:20:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 34 states have internal predecessors, (143), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-12-18 19:20:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:57,716 INFO L225 Difference]: With dead ends: 379 [2021-12-18 19:20:57,716 INFO L226 Difference]: Without dead ends: 379 [2021-12-18 19:20:57,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 19:20:57,717 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 492 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:57,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 226 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 611 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2021-12-18 19:20:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-18 19:20:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 322. [2021-12-18 19:20:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.178082191780822) internal successors, (344), 305 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 367 transitions. [2021-12-18 19:20:57,721 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 367 transitions. Word has length 53 [2021-12-18 19:20:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:57,721 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 367 transitions. [2021-12-18 19:20:57,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 34 states have internal predecessors, (143), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-18 19:20:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 367 transitions. [2021-12-18 19:20:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 19:20:57,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:57,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:57,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:57,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 19:20:57,939 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2021-12-18 19:20:57,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761409879] [2021-12-18 19:20:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:57,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:57,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:58,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:58,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761409879] [2021-12-18 19:20:58,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761409879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:58,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091723134] [2021-12-18 19:20:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:58,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:58,113 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:58,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:20:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 19:20:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:58,279 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:58,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:58,403 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-18 19:20:58,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2021-12-18 19:20:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:58,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:58,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091723134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:58,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:20:58,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-12-18 19:20:58,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82079267] [2021-12-18 19:20:58,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:58,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:20:58,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:20:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:20:58,698 INFO L87 Difference]: Start difference. First operand 322 states and 367 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:20:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:59,194 INFO L93 Difference]: Finished difference Result 350 states and 391 transitions. [2021-12-18 19:20:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:20:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-12-18 19:20:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:59,195 INFO L225 Difference]: With dead ends: 350 [2021-12-18 19:20:59,195 INFO L226 Difference]: Without dead ends: 350 [2021-12-18 19:20:59,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 19:20:59,196 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 288 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:59,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 301 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 390 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-12-18 19:20:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-18 19:20:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 321. [2021-12-18 19:20:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1712328767123288) internal successors, (342), 304 states have internal predecessors, (342), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:20:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 365 transitions. [2021-12-18 19:20:59,199 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 365 transitions. Word has length 54 [2021-12-18 19:20:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:59,199 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 365 transitions. [2021-12-18 19:20:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:20:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 365 transitions. [2021-12-18 19:20:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 19:20:59,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:59,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:59,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 19:20:59,400 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:20:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2021-12-18 19:20:59,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:59,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694182016] [2021-12-18 19:20:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:59,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:20:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:20:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:20:59,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694182016] [2021-12-18 19:20:59,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694182016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936938566] [2021-12-18 19:20:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:59,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:59,562 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:59,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:20:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:20:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 19:21:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-18 19:21:00,013 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:21:00,027 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:00,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:21:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:21:00,256 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:00,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 19:21:00,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:00,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-18 19:21:00,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:21:00,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:21:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:00,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:00,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:21:00,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936938566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:00,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:00,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2021-12-18 19:21:00,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846611105] [2021-12-18 19:21:00,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:00,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:21:00,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:21:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:21:00,661 INFO L87 Difference]: Start difference. First operand 321 states and 365 transitions. Second operand has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:02,039 INFO L93 Difference]: Finished difference Result 353 states and 390 transitions. [2021-12-18 19:21:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:21:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-12-18 19:21:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:02,040 INFO L225 Difference]: With dead ends: 353 [2021-12-18 19:21:02,040 INFO L226 Difference]: Without dead ends: 353 [2021-12-18 19:21:02,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=598, Invalid=3308, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 19:21:02,041 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 522 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:02,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 735 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 783 Invalid, 0 Unknown, 432 Unchecked, 0.3s Time] [2021-12-18 19:21:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-18 19:21:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 320. [2021-12-18 19:21:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 292 states have (on average 1.1643835616438356) internal successors, (340), 303 states have internal predecessors, (340), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:21:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 363 transitions. [2021-12-18 19:21:02,046 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 363 transitions. Word has length 55 [2021-12-18 19:21:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:02,046 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 363 transitions. [2021-12-18 19:21:02,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 363 transitions. [2021-12-18 19:21:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 19:21:02,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:02,047 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:02,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-18 19:21:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:21:02,263 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2021-12-18 19:21:02,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314501831] [2021-12-18 19:21:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:02,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:02,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:21:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:02,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:21:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 19:21:02,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:21:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314501831] [2021-12-18 19:21:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314501831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167945169] [2021-12-18 19:21:02,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:21:02,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:02,398 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:21:02,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:21:02,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:21:02,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 19:21:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:02,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:21:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:21:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:03,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167945169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:03,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:03,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-18 19:21:03,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794632027] [2021-12-18 19:21:03,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:03,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:21:03,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:21:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:21:03,057 INFO L87 Difference]: Start difference. First operand 320 states and 363 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:21:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:03,523 INFO L93 Difference]: Finished difference Result 341 states and 379 transitions. [2021-12-18 19:21:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:21:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-12-18 19:21:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:03,524 INFO L225 Difference]: With dead ends: 341 [2021-12-18 19:21:03,524 INFO L226 Difference]: Without dead ends: 341 [2021-12-18 19:21:03,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:21:03,525 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 306 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:03,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 360 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 419 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2021-12-18 19:21:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-18 19:21:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 320. [2021-12-18 19:21:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 292 states have (on average 1.154109589041096) internal successors, (337), 303 states have internal predecessors, (337), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:21:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 360 transitions. [2021-12-18 19:21:03,528 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 360 transitions. Word has length 56 [2021-12-18 19:21:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:03,528 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 360 transitions. [2021-12-18 19:21:03,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:21:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 360 transitions. [2021-12-18 19:21:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:21:03,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:03,529 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:03,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:03,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:21:03,746 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2021-12-18 19:21:03,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675326413] [2021-12-18 19:21:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:03,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:03,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:21:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:21:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:03,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:21:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675326413] [2021-12-18 19:21:03,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675326413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511815572] [2021-12-18 19:21:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:03,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:03,990 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:21:03,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:21:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 19:21:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:04,238 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:04,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:21:04,403 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:21:04,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:21:04,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:21:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:04,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:21:04,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:21:04,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:21:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:04,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:04,892 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:21:04,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-18 19:21:04,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:21:04,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511815572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:04,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:04,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-12-18 19:21:04,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374889645] [2021-12-18 19:21:04,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:04,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:21:04,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:04,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:21:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:21:04,939 INFO L87 Difference]: Start difference. First operand 320 states and 360 transitions. Second operand has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:06,161 INFO L93 Difference]: Finished difference Result 342 states and 378 transitions. [2021-12-18 19:21:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-18 19:21:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2021-12-18 19:21:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:06,162 INFO L225 Difference]: With dead ends: 342 [2021-12-18 19:21:06,162 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 19:21:06,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=927, Invalid=3903, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:21:06,164 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 989 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:06,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 457 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 524 Invalid, 0 Unknown, 279 Unchecked, 0.3s Time] [2021-12-18 19:21:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 19:21:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 317. [2021-12-18 19:21:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 300 states have internal predecessors, (333), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:21:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 356 transitions. [2021-12-18 19:21:06,168 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 356 transitions. Word has length 59 [2021-12-18 19:21:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:06,169 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 356 transitions. [2021-12-18 19:21:06,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 356 transitions. [2021-12-18 19:21:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 19:21:06,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:06,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:06,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:06,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-18 19:21:06,387 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:06,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:06,387 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2021-12-18 19:21:06,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:06,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797219916] [2021-12-18 19:21:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:06,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:06,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:21:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:21:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:06,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:21:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797219916] [2021-12-18 19:21:06,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797219916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759835861] [2021-12-18 19:21:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:06,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:06,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:06,659 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:21:06,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:21:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:21:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:06,884 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:21:06,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:21:07,140 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-12-18 19:21:07,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 30 [2021-12-18 19:21:07,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:21:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:07,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759835861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:07,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-12-18 19:21:07,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135724134] [2021-12-18 19:21:07,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:07,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:21:07,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:21:07,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:21:07,325 INFO L87 Difference]: Start difference. First operand 317 states and 356 transitions. Second operand has 24 states, 22 states have (on average 4.636363636363637) internal successors, (102), 21 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:21:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:08,327 INFO L93 Difference]: Finished difference Result 343 states and 378 transitions. [2021-12-18 19:21:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:21:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.636363636363637) internal successors, (102), 21 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-12-18 19:21:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:08,329 INFO L225 Difference]: With dead ends: 343 [2021-12-18 19:21:08,329 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 19:21:08,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=582, Invalid=2498, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:21:08,330 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 536 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:08,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 227 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 413 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2021-12-18 19:21:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 19:21:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 316. [2021-12-18 19:21:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 292 states have (on average 1.1335616438356164) internal successors, (331), 299 states have internal predecessors, (331), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:21:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 354 transitions. [2021-12-18 19:21:08,333 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 354 transitions. Word has length 60 [2021-12-18 19:21:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 354 transitions. [2021-12-18 19:21:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.636363636363637) internal successors, (102), 21 states have internal predecessors, (102), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 19:21:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 354 transitions. [2021-12-18 19:21:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:21:08,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:08,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:08,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 19:21:08,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:08,545 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2021-12-18 19:21:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:08,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397189178] [2021-12-18 19:21:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:08,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:21:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:08,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:21:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:08,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:21:08,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397189178] [2021-12-18 19:21:08,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397189178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:08,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275051818] [2021-12-18 19:21:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:08,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:08,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:08,874 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:21:08,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:21:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 19:21:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:09,198 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:09,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:21:09,210 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:09,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:21:09,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:21:09,572 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:21:09,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 19:21:09,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-18 19:21:09,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:21:09,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:21:09,897 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:21:09,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:21:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:09,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:10,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 19:21:10,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275051818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:10,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:10,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 30 [2021-12-18 19:21:10,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748283194] [2021-12-18 19:21:10,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:10,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:21:10,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:21:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 19:21:10,192 INFO L87 Difference]: Start difference. First operand 316 states and 354 transitions. Second operand has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 26 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:12,409 INFO L93 Difference]: Finished difference Result 343 states and 378 transitions. [2021-12-18 19:21:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:21:12,410 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 26 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2021-12-18 19:21:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:12,411 INFO L225 Difference]: With dead ends: 343 [2021-12-18 19:21:12,411 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 19:21:12,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 19:21:12,412 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 522 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:12,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 550 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 648 Invalid, 0 Unknown, 472 Unchecked, 0.3s Time] [2021-12-18 19:21:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 19:21:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 321. [2021-12-18 19:21:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 297 states have (on average 1.1313131313131313) internal successors, (336), 304 states have internal predecessors, (336), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:21:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 359 transitions. [2021-12-18 19:21:12,416 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 359 transitions. Word has length 61 [2021-12-18 19:21:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:12,417 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 359 transitions. [2021-12-18 19:21:12,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 26 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:21:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 359 transitions. [2021-12-18 19:21:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 19:21:12,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:12,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:12,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:12,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:12,623 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -340935575, now seen corresponding path program 1 times [2021-12-18 19:21:12,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:12,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754523773] [2021-12-18 19:21:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:12,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:12,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:21:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:12,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:21:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:12,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:21:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754523773] [2021-12-18 19:21:12,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754523773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533440421] [2021-12-18 19:21:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:12,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:12,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:12,996 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:21:12,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:21:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:21:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:13,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:21:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:13,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 19:21:13,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-18 19:21:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:13,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533440421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:21:13,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:21:13,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 36 [2021-12-18 19:21:13,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213023985] [2021-12-18 19:21:13,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:13,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:21:13,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:21:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:21:13,630 INFO L87 Difference]: Start difference. First operand 321 states and 359 transitions. Second operand has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:21:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:15,855 INFO L93 Difference]: Finished difference Result 372 states and 402 transitions. [2021-12-18 19:21:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:21:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 63 [2021-12-18 19:21:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:15,856 INFO L225 Difference]: With dead ends: 372 [2021-12-18 19:21:15,856 INFO L226 Difference]: Without dead ends: 372 [2021-12-18 19:21:15,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=904, Invalid=3788, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:21:15,857 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1126 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:15,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 462 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:21:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-18 19:21:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 311. [2021-12-18 19:21:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 288 states have (on average 1.1041666666666667) internal successors, (318), 294 states have internal predecessors, (318), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:21:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 341 transitions. [2021-12-18 19:21:15,861 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 341 transitions. Word has length 63 [2021-12-18 19:21:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:15,861 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 341 transitions. [2021-12-18 19:21:15,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 19:21:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 341 transitions. [2021-12-18 19:21:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:21:15,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:15,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:15,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-18 19:21:16,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-18 19:21:16,075 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash 701075492, now seen corresponding path program 1 times [2021-12-18 19:21:16,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689924037] [2021-12-18 19:21:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:16,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 19:21:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 19:21:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:21:16,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:21:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689924037] [2021-12-18 19:21:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689924037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364427125] [2021-12-18 19:21:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:16,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:16,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:16,206 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:21:16,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:21:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:21:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:16,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:21:16,452 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:21:16,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 21 [2021-12-18 19:21:16,482 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 19:21:16,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:21:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:16,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:16,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364427125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:16,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:16,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-12-18 19:21:16,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979389745] [2021-12-18 19:21:16,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:16,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 19:21:16,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:21:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 19:21:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:21:16,560 INFO L87 Difference]: Start difference. First operand 311 states and 341 transitions. Second operand has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 19:21:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:16,703 INFO L93 Difference]: Finished difference Result 328 states and 355 transitions. [2021-12-18 19:21:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:21:16,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-12-18 19:21:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:16,704 INFO L225 Difference]: With dead ends: 328 [2021-12-18 19:21:16,704 INFO L226 Difference]: Without dead ends: 328 [2021-12-18 19:21:16,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:21:16,705 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:16,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 148 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 153 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-12-18 19:21:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-18 19:21:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 267. [2021-12-18 19:21:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 246 states have (on average 1.0975609756097562) internal successors, (270), 252 states have internal predecessors, (270), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-18 19:21:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 291 transitions. [2021-12-18 19:21:16,711 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 291 transitions. Word has length 66 [2021-12-18 19:21:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:16,711 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 291 transitions. [2021-12-18 19:21:16,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 19:21:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 291 transitions. [2021-12-18 19:21:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 19:21:16,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:16,712 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:16,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-18 19:21:16,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:21:16,927 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1953429379, now seen corresponding path program 1 times [2021-12-18 19:21:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:21:16,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204430432] [2021-12-18 19:21:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:16,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:21:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:21:16,942 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 19:21:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:21:16,982 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-18 19:21:16,982 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 19:21:16,983 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2021-12-18 19:21:16,984 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-12-18 19:21:16,985 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-12-18 19:21:16,986 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (12 of 23 remaining) [2021-12-18 19:21:16,986 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2021-12-18 19:21:16,986 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2021-12-18 19:21:16,986 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2021-12-18 19:21:16,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2021-12-18 19:21:16,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2021-12-18 19:21:16,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2021-12-18 19:21:16,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-18 19:21:16,990 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:16,992 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 19:21:17,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:21:17 BoogieIcfgContainer [2021-12-18 19:21:17,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 19:21:17,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 19:21:17,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 19:21:17,047 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 19:21:17,047 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:20:24" (3/4) ... [2021-12-18 19:21:17,049 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-18 19:21:17,049 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 19:21:17,049 INFO L158 Benchmark]: Toolchain (without parser) took 53652.93ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 74.0MB in the beginning and 119.8MB in the end (delta: -45.8MB). Peak memory consumption was 73.3MB. Max. memory is 16.1GB. [2021-12-18 19:21:17,050 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 83.9MB. Free memory was 56.3MB in the beginning and 56.3MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:21:17,050 INFO L158 Benchmark]: CACSL2BoogieTranslator took 412.32ms. Allocated memory is still 107.0MB. Free memory was 74.0MB in the beginning and 73.7MB in the end (delta: 277.3kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 19:21:17,050 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.18ms. Allocated memory is still 107.0MB. Free memory was 73.7MB in the beginning and 71.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:21:17,050 INFO L158 Benchmark]: Boogie Preprocessor took 28.61ms. Allocated memory is still 107.0MB. Free memory was 71.7MB in the beginning and 69.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:21:17,050 INFO L158 Benchmark]: RCFGBuilder took 391.72ms. Allocated memory is still 107.0MB. Free memory was 69.6MB in the beginning and 56.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-18 19:21:17,054 INFO L158 Benchmark]: TraceAbstraction took 52761.97ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 55.4MB in the beginning and 119.8MB in the end (delta: -64.4MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2021-12-18 19:21:17,054 INFO L158 Benchmark]: Witness Printer took 2.58ms. Allocated memory is still 226.5MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:21:17,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 83.9MB. Free memory was 56.3MB in the beginning and 56.3MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 412.32ms. Allocated memory is still 107.0MB. Free memory was 74.0MB in the beginning and 73.7MB in the end (delta: 277.3kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.18ms. Allocated memory is still 107.0MB. Free memory was 73.7MB in the beginning and 71.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.61ms. Allocated memory is still 107.0MB. Free memory was 71.7MB in the beginning and 69.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 391.72ms. Allocated memory is still 107.0MB. Free memory was 69.6MB in the beginning and 56.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 52761.97ms. Allocated memory was 107.0MB in the beginning and 226.5MB in the end (delta: 119.5MB). Free memory was 55.4MB in the beginning and 119.8MB in the end (delta: -64.4MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Witness Printer took 2.58ms. Allocated memory is still 226.5MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 67 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 52.7s, OverallIterations: 46, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 20.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14473 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14462 mSDsluCounter, 11353 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2810 IncrementalHoareTripleChecker+Unchecked, 9258 mSDsCounter, 2216 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13940 IncrementalHoareTripleChecker+Invalid, 18966 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2216 mSolverCounterUnsat, 2095 mSDtfsCounter, 13940 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3177 GetRequests, 1975 SyntacticMatches, 89 SemanticMatches, 1113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11660 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=645occurred in iteration=21, InterpolantAutomatonStates: 710, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 45 MinimizatonAttempts, 2201 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 3221 NumberOfCodeBlocks, 3221 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 3534 ConstructedInterpolants, 283 QuantifiedInterpolants, 43852 SizeOfPredicates, 179 NumberOfNonLiveVariables, 9299 ConjunctsInSsa, 718 ConjunctsInUnsatCore, 91 InterpolantComputations, 14 PerfectInterpolantSequences, 949/2086 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-18 19:21:17,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:21:18,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:21:18,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:21:18,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:21:18,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:21:18,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:21:18,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:21:18,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:21:18,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:21:18,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:21:18,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:21:18,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:21:18,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:21:18,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:21:18,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:21:18,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:21:18,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:21:18,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:21:18,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:21:18,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:21:18,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:21:18,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:21:18,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:21:18,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:21:18,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:21:18,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:21:18,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:21:18,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:21:18,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:21:18,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:21:18,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:21:18,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:21:18,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:21:18,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:21:18,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:21:18,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:21:18,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:21:18,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:21:18,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:21:18,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:21:18,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:21:18,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-12-18 19:21:18,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:21:18,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:21:18,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:21:18,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:21:18,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:21:18,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:21:18,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:21:18,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:21:18,702 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:21:18,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:21:18,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:21:18,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:21:18,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:21:18,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:21:18,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:21:18,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:21:18,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:21:18,705 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 19:21:18,705 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 19:21:18,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:21:18,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 19:21:18,706 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-12-18 19:21:18,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:21:18,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:21:18,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:21:18,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:21:18,995 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:21:18,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 19:21:19,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97edfb5d/a1c3d182c6b442d18c8d5cbda2082fa0/FLAG47843fd31 [2021-12-18 19:21:19,398 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:21:19,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-18 19:21:19,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97edfb5d/a1c3d182c6b442d18c8d5cbda2082fa0/FLAG47843fd31 [2021-12-18 19:21:19,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97edfb5d/a1c3d182c6b442d18c8d5cbda2082fa0 [2021-12-18 19:21:19,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:21:19,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:21:19,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:21:19,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:21:19,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:21:19,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:21:19" (1/1) ... [2021-12-18 19:21:19,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7ba0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:19, skipping insertion in model container [2021-12-18 19:21:19,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:21:19" (1/1) ... [2021-12-18 19:21:19,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:21:19,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:21:20,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:21:20,079 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:21:20,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:21:20,145 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:21:20,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20 WrapperNode [2021-12-18 19:21:20,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:21:20,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:21:20,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:21:20,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:21:20,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,203 INFO L137 Inliner]: procedures = 169, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2021-12-18 19:21:20,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:21:20,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:21:20,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:21:20,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:21:20,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:21:20,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:21:20,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:21:20,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:21:20,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (1/1) ... [2021-12-18 19:21:20,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:21:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:21:20,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 19:21:20,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 19:21:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-18 19:21:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-18 19:21:20,302 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-18 19:21:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 19:21:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 19:21:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 19:21:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:21:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 19:21:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 19:21:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:21:20,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:21:20,437 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:21:20,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:21:20,663 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:21:20,668 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:21:20,668 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-18 19:21:20,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:21:20 BoogieIcfgContainer [2021-12-18 19:21:20,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:21:20,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:21:20,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:21:20,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:21:20,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:21:19" (1/3) ... [2021-12-18 19:21:20,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fe72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:21:20, skipping insertion in model container [2021-12-18 19:21:20,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:21:20" (2/3) ... [2021-12-18 19:21:20,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fe72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:21:20, skipping insertion in model container [2021-12-18 19:21:20,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:21:20" (3/3) ... [2021-12-18 19:21:20,675 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-12-18 19:21:20,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:21:20,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-12-18 19:21:20,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:21:20,709 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 19:21:20,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-12-18 19:21:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 19:21:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:21:20,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:20,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:21:20,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2021-12-18 19:21:20,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:20,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99064721] [2021-12-18 19:21:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:20,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:20,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:20,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 19:21:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:20,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:21:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:20,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:20,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:20,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99064721] [2021-12-18 19:21:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99064721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:20,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:20,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 19:21:20,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762601602] [2021-12-18 19:21:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:20,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:21:20,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:21:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:20,942 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:21,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:21,076 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2021-12-18 19:21:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:21:21,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:21:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:21,089 INFO L225 Difference]: With dead ends: 121 [2021-12-18 19:21:21,090 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 19:21:21,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:21,094 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:21,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:21:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 19:21:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2021-12-18 19:21:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 80 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 19:21:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2021-12-18 19:21:21,122 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 6 [2021-12-18 19:21:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:21,122 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2021-12-18 19:21:21,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2021-12-18 19:21:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:21:21,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:21,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:21:21,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:21,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:21,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2021-12-18 19:21:21,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:21,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200520189] [2021-12-18 19:21:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:21,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:21,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:21,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:21,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 19:21:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:21:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:21,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:21,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:21,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200520189] [2021-12-18 19:21:21,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200520189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:21,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:21,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:21:21,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154965493] [2021-12-18 19:21:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:21,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:21:21,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:21:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:21:21,467 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:21,617 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2021-12-18 19:21:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:21:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-18 19:21:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:21,623 INFO L225 Difference]: With dead ends: 214 [2021-12-18 19:21:21,625 INFO L226 Difference]: Without dead ends: 214 [2021-12-18 19:21:21,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:21:21,626 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 143 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:21,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 158 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:21:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-18 19:21:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-12-18 19:21:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 142 states have internal predecessors, (212), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-18 19:21:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2021-12-18 19:21:21,652 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 6 [2021-12-18 19:21:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:21,652 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2021-12-18 19:21:21,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2021-12-18 19:21:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:21:21,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:21,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:21,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:21,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:21,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2021-12-18 19:21:21,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768119207] [2021-12-18 19:21:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:21,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:21,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:21,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 19:21:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:21:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:22,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:22,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:22,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:22,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768119207] [2021-12-18 19:21:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768119207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:22,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:21:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156888306] [2021-12-18 19:21:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:21:22,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:21:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:21:22,014 INFO L87 Difference]: Start difference. First operand 156 states and 243 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:22,195 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2021-12-18 19:21:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:21:22,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:21:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:22,198 INFO L225 Difference]: With dead ends: 247 [2021-12-18 19:21:22,198 INFO L226 Difference]: Without dead ends: 247 [2021-12-18 19:21:22,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:21:22,199 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:22,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 191 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:21:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-18 19:21:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2021-12-18 19:21:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 145 states have internal predecessors, (215), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-18 19:21:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2021-12-18 19:21:22,209 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 7 [2021-12-18 19:21:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:22,209 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2021-12-18 19:21:22,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2021-12-18 19:21:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:21:22,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:22,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:22,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:22,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:22,417 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2021-12-18 19:21:22,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:22,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426119742] [2021-12-18 19:21:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:22,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:22,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:22,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 19:21:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:22,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 19:21:22,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:22,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:22,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:22,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426119742] [2021-12-18 19:21:22,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426119742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:22,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:22,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:21:22,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65288924] [2021-12-18 19:21:22,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:21:22,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:21:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:21:22,598 INFO L87 Difference]: Start difference. First operand 159 states and 246 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:22,753 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2021-12-18 19:21:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:21:22,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 19:21:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:22,755 INFO L225 Difference]: With dead ends: 216 [2021-12-18 19:21:22,755 INFO L226 Difference]: Without dead ends: 216 [2021-12-18 19:21:22,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:21:22,756 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 146 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:22,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 210 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:21:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-18 19:21:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2021-12-18 19:21:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 145 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-18 19:21:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2021-12-18 19:21:22,768 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 8 [2021-12-18 19:21:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:22,768 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2021-12-18 19:21:22,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2021-12-18 19:21:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:21:22,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:22,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:22,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:22,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:22,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2021-12-18 19:21:22,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:22,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145823901] [2021-12-18 19:21:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:22,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:22,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:22,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 19:21:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:21:23,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:23,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:23,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145823901] [2021-12-18 19:21:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145823901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:23,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:23,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:21:23,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058815306] [2021-12-18 19:21:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:23,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:21:23,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:23,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:21:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:21:23,071 INFO L87 Difference]: Start difference. First operand 159 states and 244 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:23,181 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2021-12-18 19:21:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:21:23,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:21:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:23,183 INFO L225 Difference]: With dead ends: 253 [2021-12-18 19:21:23,183 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 19:21:23,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:21:23,183 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:21:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 19:21:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2021-12-18 19:21:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 177 states have internal predecessors, (259), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-18 19:21:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2021-12-18 19:21:23,191 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2021-12-18 19:21:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:23,191 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2021-12-18 19:21:23,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2021-12-18 19:21:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:21:23,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:23,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:23,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:23,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:23,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2021-12-18 19:21:23,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:23,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133543477] [2021-12-18 19:21:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:23,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:23,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:23,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 19:21:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:21:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:23,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:23,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133543477] [2021-12-18 19:21:23,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133543477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:23,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:23,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:21:23,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918091358] [2021-12-18 19:21:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:23,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:21:23,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:21:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:21:23,495 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:23,629 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-12-18 19:21:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:21:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:21:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:23,631 INFO L225 Difference]: With dead ends: 242 [2021-12-18 19:21:23,631 INFO L226 Difference]: Without dead ends: 242 [2021-12-18 19:21:23,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:21:23,632 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:23,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:21:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-18 19:21:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-12-18 19:21:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 167 states have (on average 1.6766467065868262) internal successors, (280), 191 states have internal predecessors, (280), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-18 19:21:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 311 transitions. [2021-12-18 19:21:23,639 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 311 transitions. Word has length 10 [2021-12-18 19:21:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:23,640 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 311 transitions. [2021-12-18 19:21:23,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 311 transitions. [2021-12-18 19:21:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:21:23,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:23,640 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:23,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:23,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:23,847 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:23,847 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2021-12-18 19:21:23,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:23,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415774742] [2021-12-18 19:21:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:23,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:23,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:23,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:23,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 19:21:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:21:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:24,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:24,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:24,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415774742] [2021-12-18 19:21:24,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415774742] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:21:24,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:24,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-12-18 19:21:24,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729883805] [2021-12-18 19:21:24,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:24,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:21:24,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:21:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:21:24,365 INFO L87 Difference]: Start difference. First operand 206 states and 311 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:24,697 INFO L93 Difference]: Finished difference Result 368 states and 497 transitions. [2021-12-18 19:21:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:21:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:21:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:24,700 INFO L225 Difference]: With dead ends: 368 [2021-12-18 19:21:24,700 INFO L226 Difference]: Without dead ends: 368 [2021-12-18 19:21:24,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:21:24,700 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 444 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:24,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 286 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:21:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-18 19:21:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 241. [2021-12-18 19:21:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 200 states have (on average 1.655) internal successors, (331), 226 states have internal predecessors, (331), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-18 19:21:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 368 transitions. [2021-12-18 19:21:24,708 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 368 transitions. Word has length 14 [2021-12-18 19:21:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:24,708 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 368 transitions. [2021-12-18 19:21:24,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 368 transitions. [2021-12-18 19:21:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:21:24,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:24,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:24,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-18 19:21:24,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:24,917 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2021-12-18 19:21:24,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:24,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803496625] [2021-12-18 19:21:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:24,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:24,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:24,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 19:21:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:21:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:25,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:25,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:25,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:25,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803496625] [2021-12-18 19:21:25,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803496625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:21:25,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:25,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-18 19:21:25,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196370052] [2021-12-18 19:21:25,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:25,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:21:25,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:21:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:21:25,249 INFO L87 Difference]: Start difference. First operand 241 states and 368 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:25,596 INFO L93 Difference]: Finished difference Result 418 states and 596 transitions. [2021-12-18 19:21:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:21:25,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:21:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:25,598 INFO L225 Difference]: With dead ends: 418 [2021-12-18 19:21:25,598 INFO L226 Difference]: Without dead ends: 418 [2021-12-18 19:21:25,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:21:25,599 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 242 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:25,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 449 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:21:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-18 19:21:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 251. [2021-12-18 19:21:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 210 states have (on average 1.6476190476190475) internal successors, (346), 236 states have internal predecessors, (346), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-18 19:21:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 383 transitions. [2021-12-18 19:21:25,606 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 383 transitions. Word has length 15 [2021-12-18 19:21:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:25,606 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 383 transitions. [2021-12-18 19:21:25,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 383 transitions. [2021-12-18 19:21:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:21:25,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:25,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:25,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:25,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:25,812 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2021-12-18 19:21:25,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:25,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130333712] [2021-12-18 19:21:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:25,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:25,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:25,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 19:21:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 19:21:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:26,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:26,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:26,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130333712] [2021-12-18 19:21:26,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130333712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:21:26,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:26,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-12-18 19:21:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938509232] [2021-12-18 19:21:26,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:26,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:21:26,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:21:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:21:26,199 INFO L87 Difference]: Start difference. First operand 251 states and 383 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:26,958 INFO L93 Difference]: Finished difference Result 634 states and 850 transitions. [2021-12-18 19:21:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:21:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 19:21:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:26,961 INFO L225 Difference]: With dead ends: 634 [2021-12-18 19:21:26,961 INFO L226 Difference]: Without dead ends: 634 [2021-12-18 19:21:26,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:21:26,962 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 606 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:26,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 633 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:21:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-18 19:21:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 349. [2021-12-18 19:21:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 330 states have internal predecessors, (503), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-18 19:21:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 553 transitions. [2021-12-18 19:21:26,978 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 553 transitions. Word has length 16 [2021-12-18 19:21:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 553 transitions. [2021-12-18 19:21:26,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 553 transitions. [2021-12-18 19:21:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:21:26,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:26,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:26,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:27,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:27,186 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2021-12-18 19:21:27,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:27,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164568116] [2021-12-18 19:21:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:27,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:27,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:27,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 19:21:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:27,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:21:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:27,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:27,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164568116] [2021-12-18 19:21:27,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164568116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:27,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:27,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 19:21:27,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934222230] [2021-12-18 19:21:27,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:27,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:21:27,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:21:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:27,271 INFO L87 Difference]: Start difference. First operand 349 states and 553 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:27,298 INFO L93 Difference]: Finished difference Result 493 states and 776 transitions. [2021-12-18 19:21:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:21:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:21:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:27,302 INFO L225 Difference]: With dead ends: 493 [2021-12-18 19:21:27,302 INFO L226 Difference]: Without dead ends: 493 [2021-12-18 19:21:27,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:27,303 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:27,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:21:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-18 19:21:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 477. [2021-12-18 19:21:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 420 states have (on average 1.6547619047619047) internal successors, (695), 451 states have internal predecessors, (695), 15 states have call successors, (15), 10 states have call predecessors, (15), 19 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2021-12-18 19:21:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 774 transitions. [2021-12-18 19:21:27,319 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 774 transitions. Word has length 18 [2021-12-18 19:21:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:27,320 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 774 transitions. [2021-12-18 19:21:27,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 774 transitions. [2021-12-18 19:21:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:21:27,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:27,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:27,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:27,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:27,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2021-12-18 19:21:27,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:27,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633847760] [2021-12-18 19:21:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:27,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:27,529 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:27,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 19:21:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:21:27,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:27,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:27,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633847760] [2021-12-18 19:21:27,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633847760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:27,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:27,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:21:27,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879344404] [2021-12-18 19:21:27,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:27,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:21:27,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:21:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:27,643 INFO L87 Difference]: Start difference. First operand 477 states and 774 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:27,669 INFO L93 Difference]: Finished difference Result 523 states and 806 transitions. [2021-12-18 19:21:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:21:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 19:21:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:27,671 INFO L225 Difference]: With dead ends: 523 [2021-12-18 19:21:27,672 INFO L226 Difference]: Without dead ends: 523 [2021-12-18 19:21:27,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:27,672 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:27,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 120 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:21:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-18 19:21:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 506. [2021-12-18 19:21:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6322869955156951) internal successors, (728), 479 states have internal predecessors, (728), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2021-12-18 19:21:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2021-12-18 19:21:27,681 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 18 [2021-12-18 19:21:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:27,681 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2021-12-18 19:21:27,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2021-12-18 19:21:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:21:27,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:27,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:27,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-18 19:21:27,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:27,889 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2021-12-18 19:21:27,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:27,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672029224] [2021-12-18 19:21:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:27,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:27,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:27,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 19:21:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:21:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:28,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:28,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:28,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672029224] [2021-12-18 19:21:28,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672029224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:28,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:28,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 19:21:28,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968548378] [2021-12-18 19:21:28,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:28,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:21:28,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:21:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:28,016 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:28,047 INFO L93 Difference]: Finished difference Result 521 states and 801 transitions. [2021-12-18 19:21:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:21:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-18 19:21:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:28,049 INFO L225 Difference]: With dead ends: 521 [2021-12-18 19:21:28,049 INFO L226 Difference]: Without dead ends: 521 [2021-12-18 19:21:28,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:28,050 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:28,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:21:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-18 19:21:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 506. [2021-12-18 19:21:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6233183856502242) internal successors, (724), 479 states have internal predecessors, (724), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2021-12-18 19:21:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 797 transitions. [2021-12-18 19:21:28,058 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 797 transitions. Word has length 19 [2021-12-18 19:21:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:28,058 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 797 transitions. [2021-12-18 19:21:28,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 797 transitions. [2021-12-18 19:21:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 19:21:28,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:28,059 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-18 19:21:28,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:28,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:28,266 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1621609206, now seen corresponding path program 2 times [2021-12-18 19:21:28,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:28,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417553366] [2021-12-18 19:21:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:21:28,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:28,268 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:28,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 19:21:28,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:21:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:21:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 19:21:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:28,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:29,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417553366] [2021-12-18 19:21:29,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417553366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:21:29,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:29,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-12-18 19:21:29,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127663712] [2021-12-18 19:21:29,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:29,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:21:29,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:21:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:21:29,213 INFO L87 Difference]: Start difference. First operand 506 states and 797 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:31,499 INFO L93 Difference]: Finished difference Result 838 states and 1226 transitions. [2021-12-18 19:21:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:21:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 19:21:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:31,502 INFO L225 Difference]: With dead ends: 838 [2021-12-18 19:21:31,503 INFO L226 Difference]: Without dead ends: 838 [2021-12-18 19:21:31,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:21:31,503 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 302 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:31,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 604 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-18 19:21:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-18 19:21:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 556. [2021-12-18 19:21:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 493 states have (on average 1.6470588235294117) internal successors, (812), 529 states have internal predecessors, (812), 15 states have call successors, (15), 11 states have call predecessors, (15), 25 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2021-12-18 19:21:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 882 transitions. [2021-12-18 19:21:31,518 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 882 transitions. Word has length 22 [2021-12-18 19:21:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:31,518 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 882 transitions. [2021-12-18 19:21:31,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:21:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 882 transitions. [2021-12-18 19:21:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:21:31,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:31,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:31,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:31,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:31,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2021-12-18 19:21:31,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504311924] [2021-12-18 19:21:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:31,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:31,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:31,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 19:21:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 19:21:31,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:31,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:31,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:31,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504311924] [2021-12-18 19:21:31,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504311924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:31,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:31,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:21:31,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035935970] [2021-12-18 19:21:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:31,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:21:31,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:21:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:31,809 INFO L87 Difference]: Start difference. First operand 556 states and 882 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:21:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:31,814 INFO L93 Difference]: Finished difference Result 400 states and 619 transitions. [2021-12-18 19:21:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:21:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-18 19:21:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:31,817 INFO L225 Difference]: With dead ends: 400 [2021-12-18 19:21:31,817 INFO L226 Difference]: Without dead ends: 400 [2021-12-18 19:21:31,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:21:31,818 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 13 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:31,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:21:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-18 19:21:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-12-18 19:21:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 349 states have (on average 1.6389684813753582) internal successors, (572), 380 states have internal predecessors, (572), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-12-18 19:21:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 619 transitions. [2021-12-18 19:21:31,826 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 619 transitions. Word has length 25 [2021-12-18 19:21:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:31,826 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 619 transitions. [2021-12-18 19:21:31,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:21:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 619 transitions. [2021-12-18 19:21:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:21:31,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:31,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:31,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:32,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:32,036 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2021-12-18 19:21:32,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:32,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148025280] [2021-12-18 19:21:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:32,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:32,038 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:32,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 19:21:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:21:32,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:34,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:21:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:34,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:36,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:36,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148025280] [2021-12-18 19:21:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148025280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:36,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [434469398] [2021-12-18 19:21:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:36,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:21:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:21:36,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:21:36,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-18 19:21:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:21:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:39,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:21:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:39,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:39,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [434469398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:39,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:39,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-18 19:21:39,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765085961] [2021-12-18 19:21:39,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:39,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:21:39,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:21:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2021-12-18 19:21:39,467 INFO L87 Difference]: Start difference. First operand 400 states and 619 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:21:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:43,836 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2021-12-18 19:21:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:21:43,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-18 19:21:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:43,839 INFO L225 Difference]: With dead ends: 697 [2021-12-18 19:21:43,839 INFO L226 Difference]: Without dead ends: 697 [2021-12-18 19:21:43,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=74, Invalid=162, Unknown=4, NotChecked=0, Total=240 [2021-12-18 19:21:43,839 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 220 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:43,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 273 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-18 19:21:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-12-18 19:21:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 607. [2021-12-18 19:21:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 542 states have (on average 1.5904059040590406) internal successors, (862), 578 states have internal predecessors, (862), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2021-12-18 19:21:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 937 transitions. [2021-12-18 19:21:43,849 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 937 transitions. Word has length 27 [2021-12-18 19:21:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 937 transitions. [2021-12-18 19:21:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:21:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 937 transitions. [2021-12-18 19:21:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 19:21:43,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:43,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:43,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-12-18 19:21:44,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:44,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:44,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2021-12-18 19:21:44,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:44,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69903869] [2021-12-18 19:21:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:44,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:44,254 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:44,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 19:21:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:44,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 19:21:44,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:44,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:21:44,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:44,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69903869] [2021-12-18 19:21:44,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69903869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:21:44,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:21:44,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:21:44,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967642867] [2021-12-18 19:21:44,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:21:44,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:21:44,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:44,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:21:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:21:44,465 INFO L87 Difference]: Start difference. First operand 607 states and 937 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:21:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:21:44,612 INFO L93 Difference]: Finished difference Result 560 states and 812 transitions. [2021-12-18 19:21:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:21:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-18 19:21:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:21:44,614 INFO L225 Difference]: With dead ends: 560 [2021-12-18 19:21:44,615 INFO L226 Difference]: Without dead ends: 560 [2021-12-18 19:21:44,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:21:44,615 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:21:44,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 215 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:21:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-18 19:21:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 488. [2021-12-18 19:21:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 432 states have (on average 1.5648148148148149) internal successors, (676), 464 states have internal predecessors, (676), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2021-12-18 19:21:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 732 transitions. [2021-12-18 19:21:44,624 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 732 transitions. Word has length 28 [2021-12-18 19:21:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:21:44,624 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 732 transitions. [2021-12-18 19:21:44,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:21:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 732 transitions. [2021-12-18 19:21:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:21:44,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:21:44,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:21:44,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:21:44,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:21:44,826 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:21:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:21:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2021-12-18 19:21:44,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:21:44,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670067427] [2021-12-18 19:21:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:44,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:21:44,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:21:44,827 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:21:44,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 19:21:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:21:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:47,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:21:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:47,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:47,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:49,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:21:49,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670067427] [2021-12-18 19:21:49,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670067427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:49,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [863566236] [2021-12-18 19:21:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:21:49,568 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:21:49,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:21:49,569 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:21:49,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-18 19:21:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:21:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:21:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:21:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:21:54,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:54,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:21:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:21:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:56,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [863566236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:21:56,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:21:56,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-12-18 19:21:56,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623654588] [2021-12-18 19:21:56,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:21:56,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:21:56,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:21:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:21:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2021-12-18 19:21:56,236 INFO L87 Difference]: Start difference. First operand 488 states and 732 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:02,745 INFO L93 Difference]: Finished difference Result 567 states and 795 transitions. [2021-12-18 19:22:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:22:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-18 19:22:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:02,748 INFO L225 Difference]: With dead ends: 567 [2021-12-18 19:22:02,748 INFO L226 Difference]: Without dead ends: 567 [2021-12-18 19:22:02,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2021-12-18 19:22:02,749 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 244 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:02,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2021-12-18 19:22:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-12-18 19:22:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 489. [2021-12-18 19:22:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 433 states have (on average 1.5588914549653579) internal successors, (675), 465 states have internal predecessors, (675), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2021-12-18 19:22:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 731 transitions. [2021-12-18 19:22:02,756 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 731 transitions. Word has length 29 [2021-12-18 19:22:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:02,756 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 731 transitions. [2021-12-18 19:22:02,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 731 transitions. [2021-12-18 19:22:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:22:02,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:02,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:02,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-18 19:22:02,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:03,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:03,160 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2021-12-18 19:22:03,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:03,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963038945] [2021-12-18 19:22:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:03,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:03,161 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:03,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-18 19:22:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 19:22:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:03,351 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:22:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 19:22:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:03,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:03,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963038945] [2021-12-18 19:22:03,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963038945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:22:03,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:03,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-12-18 19:22:03,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289649611] [2021-12-18 19:22:03,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:03,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:22:03,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:22:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:22:03,587 INFO L87 Difference]: Start difference. First operand 489 states and 731 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:22:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:03,908 INFO L93 Difference]: Finished difference Result 613 states and 857 transitions. [2021-12-18 19:22:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:22:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-18 19:22:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:03,910 INFO L225 Difference]: With dead ends: 613 [2021-12-18 19:22:03,910 INFO L226 Difference]: Without dead ends: 613 [2021-12-18 19:22:03,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:22:03,911 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 417 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:03,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 252 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2021-12-18 19:22:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-18 19:22:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 575. [2021-12-18 19:22:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 516 states have (on average 1.494186046511628) internal successors, (771), 549 states have internal predecessors, (771), 13 states have call successors, (13), 12 states have call predecessors, (13), 23 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2021-12-18 19:22:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 827 transitions. [2021-12-18 19:22:03,925 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 827 transitions. Word has length 30 [2021-12-18 19:22:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:03,926 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 827 transitions. [2021-12-18 19:22:03,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:22:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 827 transitions. [2021-12-18 19:22:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 19:22:03,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:03,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:03,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-18 19:22:04,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:04,135 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:04,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2021-12-18 19:22:04,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:04,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849939953] [2021-12-18 19:22:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:04,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:04,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-18 19:22:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:22:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:06,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:06,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:06,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:06,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:06,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849939953] [2021-12-18 19:22:06,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849939953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:06,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1093622941] [2021-12-18 19:22:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:06,615 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:06,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:22:06,616 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:22:06,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-18 19:22:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:22:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:08,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:09,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1093622941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:09,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:09,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-18 19:22:09,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992452826] [2021-12-18 19:22:09,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:09,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:22:09,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:22:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2021-12-18 19:22:09,070 INFO L87 Difference]: Start difference. First operand 575 states and 827 transitions. Second operand has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:09,533 INFO L93 Difference]: Finished difference Result 735 states and 974 transitions. [2021-12-18 19:22:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:22:09,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-12-18 19:22:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:09,535 INFO L225 Difference]: With dead ends: 735 [2021-12-18 19:22:09,535 INFO L226 Difference]: Without dead ends: 735 [2021-12-18 19:22:09,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2021-12-18 19:22:09,536 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 305 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:09,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 304 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 173 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-12-18 19:22:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-12-18 19:22:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 670. [2021-12-18 19:22:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 608 states have (on average 1.4638157894736843) internal successors, (890), 643 states have internal predecessors, (890), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-18 19:22:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 941 transitions. [2021-12-18 19:22:09,548 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 941 transitions. Word has length 31 [2021-12-18 19:22:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:09,549 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 941 transitions. [2021-12-18 19:22:09,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 941 transitions. [2021-12-18 19:22:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 19:22:09,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:09,550 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:09,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:09,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:09,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:09,958 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2021-12-18 19:22:09,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081832642] [2021-12-18 19:22:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:09,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:09,959 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:09,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-18 19:22:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:22:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:12,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:12,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:12,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:13,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081832642] [2021-12-18 19:22:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081832642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881349035] [2021-12-18 19:22:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:13,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:13,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:22:13,073 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:22:13,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-18 19:22:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:13,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 19:22:13,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:15,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:16,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881349035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:16,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:16,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-18 19:22:16,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671824533] [2021-12-18 19:22:16,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:22:16,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:22:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2021-12-18 19:22:16,169 INFO L87 Difference]: Start difference. First operand 670 states and 941 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:20,771 INFO L93 Difference]: Finished difference Result 924 states and 1228 transitions. [2021-12-18 19:22:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:22:20,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-18 19:22:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:20,774 INFO L225 Difference]: With dead ends: 924 [2021-12-18 19:22:20,775 INFO L226 Difference]: Without dead ends: 924 [2021-12-18 19:22:20,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=106, Invalid=271, Unknown=3, NotChecked=0, Total=380 [2021-12-18 19:22:20,775 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 320 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:20,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 320 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 190 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2021-12-18 19:22:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-18 19:22:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 757. [2021-12-18 19:22:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 692 states have (on average 1.4609826589595376) internal successors, (1011), 728 states have internal predecessors, (1011), 14 states have call successors, (14), 14 states have call predecessors, (14), 28 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2021-12-18 19:22:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1064 transitions. [2021-12-18 19:22:20,792 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1064 transitions. Word has length 35 [2021-12-18 19:22:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:20,792 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1064 transitions. [2021-12-18 19:22:20,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1064 transitions. [2021-12-18 19:22:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 19:22:20,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:20,794 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:20,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:21,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:21,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:21,200 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2021-12-18 19:22:21,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031721357] [2021-12-18 19:22:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:21,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:21,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:21,201 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:21,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-18 19:22:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:21,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:22:21,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-18 19:22:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:21,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:22,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:22,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031721357] [2021-12-18 19:22:22,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031721357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:22:22,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:22,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-18 19:22:22,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693687154] [2021-12-18 19:22:22,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:22,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:22:22,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:22:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:22:22,385 INFO L87 Difference]: Start difference. First operand 757 states and 1064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:22:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:23,474 INFO L93 Difference]: Finished difference Result 780 states and 1062 transitions. [2021-12-18 19:22:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:22:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-18 19:22:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:23,477 INFO L225 Difference]: With dead ends: 780 [2021-12-18 19:22:23,477 INFO L226 Difference]: Without dead ends: 780 [2021-12-18 19:22:23,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:22:23,477 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 314 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:23,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 617 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 19:22:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-12-18 19:22:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 556. [2021-12-18 19:22:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 505 states have (on average 1.495049504950495) internal successors, (755), 535 states have internal predecessors, (755), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-18 19:22:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 791 transitions. [2021-12-18 19:22:23,486 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 791 transitions. Word has length 36 [2021-12-18 19:22:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:23,486 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 791 transitions. [2021-12-18 19:22:23,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:22:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 791 transitions. [2021-12-18 19:22:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 19:22:23,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:23,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:23,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:23,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:23,694 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2021-12-18 19:22:23,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:23,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755710623] [2021-12-18 19:22:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:23,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:23,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:23,696 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:23,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-18 19:22:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:22:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:23,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:23,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755710623] [2021-12-18 19:22:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755710623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:22:23,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:23,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-18 19:22:23,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061402951] [2021-12-18 19:22:23,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:23,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:22:23,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:22:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:22:23,960 INFO L87 Difference]: Start difference. First operand 556 states and 791 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:24,013 INFO L93 Difference]: Finished difference Result 566 states and 793 transitions. [2021-12-18 19:22:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:22:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-18 19:22:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:24,015 INFO L225 Difference]: With dead ends: 566 [2021-12-18 19:22:24,015 INFO L226 Difference]: Without dead ends: 566 [2021-12-18 19:22:24,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:22:24,016 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:24,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:22:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-18 19:22:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 552. [2021-12-18 19:22:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 504 states have (on average 1.4742063492063493) internal successors, (743), 531 states have internal predecessors, (743), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-12-18 19:22:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 779 transitions. [2021-12-18 19:22:24,028 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 779 transitions. Word has length 40 [2021-12-18 19:22:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:24,028 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 779 transitions. [2021-12-18 19:22:24,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 779 transitions. [2021-12-18 19:22:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:22:24,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:24,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:24,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:24,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:24,237 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:24,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2021-12-18 19:22:24,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:24,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134815613] [2021-12-18 19:22:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:24,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:24,239 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:24,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-18 19:22:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:22:24,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:24,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:24,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134815613] [2021-12-18 19:22:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134815613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:22:24,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:24,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-12-18 19:22:24,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126741539] [2021-12-18 19:22:24,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:24,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:22:24,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:22:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:22:24,658 INFO L87 Difference]: Start difference. First operand 552 states and 779 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:22:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:24,826 INFO L93 Difference]: Finished difference Result 498 states and 677 transitions. [2021-12-18 19:22:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:22:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-18 19:22:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:24,828 INFO L225 Difference]: With dead ends: 498 [2021-12-18 19:22:24,828 INFO L226 Difference]: Without dead ends: 498 [2021-12-18 19:22:24,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:22:24,829 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 75 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:24,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 202 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:22:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-18 19:22:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 466. [2021-12-18 19:22:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 426 states have (on average 1.4553990610328638) internal successors, (620), 447 states have internal predecessors, (620), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-18 19:22:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 648 transitions. [2021-12-18 19:22:24,835 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 648 transitions. Word has length 41 [2021-12-18 19:22:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:24,835 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 648 transitions. [2021-12-18 19:22:24,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:22:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 648 transitions. [2021-12-18 19:22:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 19:22:24,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:24,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:24,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:25,042 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2021-12-18 19:22:25,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538801695] [2021-12-18 19:22:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:25,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:25,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:25,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:25,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-18 19:22:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 19:22:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:22:25,270 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:22:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-18 19:22:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:25,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:22:25,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538801695] [2021-12-18 19:22:25,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538801695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:22:25,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:25,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-18 19:22:25,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817430478] [2021-12-18 19:22:25,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:25,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:22:25,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:22:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:22:25,459 INFO L87 Difference]: Start difference. First operand 466 states and 648 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:25,638 INFO L93 Difference]: Finished difference Result 493 states and 660 transitions. [2021-12-18 19:22:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:22:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-12-18 19:22:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:25,640 INFO L225 Difference]: With dead ends: 493 [2021-12-18 19:22:25,640 INFO L226 Difference]: Without dead ends: 493 [2021-12-18 19:22:25,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:22:25,641 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 37 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:25,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:22:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-18 19:22:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 474. [2021-12-18 19:22:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 434 states have (on average 1.4377880184331797) internal successors, (624), 455 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-18 19:22:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 652 transitions. [2021-12-18 19:22:25,650 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 652 transitions. Word has length 42 [2021-12-18 19:22:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:25,650 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 652 transitions. [2021-12-18 19:22:25,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 652 transitions. [2021-12-18 19:22:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 19:22:25,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:25,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:25,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:25,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:25,858 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2034116786, now seen corresponding path program 1 times [2021-12-18 19:22:25,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280240882] [2021-12-18 19:22:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:25,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:25,860 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:25,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-18 19:22:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:22:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:22:26,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:22:26,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:26,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280240882] [2021-12-18 19:22:26,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280240882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:22:26,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:26,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 19:22:26,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601172315] [2021-12-18 19:22:26,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:26,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:22:26,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:22:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:22:26,124 INFO L87 Difference]: Start difference. First operand 474 states and 652 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:26,231 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2021-12-18 19:22:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:22:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-18 19:22:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:26,234 INFO L225 Difference]: With dead ends: 384 [2021-12-18 19:22:26,234 INFO L226 Difference]: Without dead ends: 384 [2021-12-18 19:22:26,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:22:26,235 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 124 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:26,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 295 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:22:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-12-18 19:22:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 349. [2021-12-18 19:22:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 312 states have (on average 1.3397435897435896) internal successors, (418), 332 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-18 19:22:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 442 transitions. [2021-12-18 19:22:26,240 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 442 transitions. Word has length 44 [2021-12-18 19:22:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:26,240 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 442 transitions. [2021-12-18 19:22:26,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 442 transitions. [2021-12-18 19:22:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 19:22:26,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:26,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:26,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:26,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:26,448 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1418260067, now seen corresponding path program 1 times [2021-12-18 19:22:26,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:26,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151672539] [2021-12-18 19:22:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:26,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:26,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:26,450 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:26,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-18 19:22:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 19:22:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 19:22:26,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:22:26,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:26,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151672539] [2021-12-18 19:22:26,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151672539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:22:26,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:22:26,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:22:26,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219894558] [2021-12-18 19:22:26,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:22:26,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:22:26,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:22:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:22:26,573 INFO L87 Difference]: Start difference. First operand 349 states and 442 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:26,579 INFO L93 Difference]: Finished difference Result 323 states and 395 transitions. [2021-12-18 19:22:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:22:26,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-12-18 19:22:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:26,581 INFO L225 Difference]: With dead ends: 323 [2021-12-18 19:22:26,581 INFO L226 Difference]: Without dead ends: 323 [2021-12-18 19:22:26,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:22:26,582 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:26,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:22:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-18 19:22:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2021-12-18 19:22:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 282 states have (on average 1.2872340425531914) internal successors, (363), 298 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-18 19:22:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 387 transitions. [2021-12-18 19:22:26,586 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 387 transitions. Word has length 47 [2021-12-18 19:22:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 387 transitions. [2021-12-18 19:22:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 19:22:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 387 transitions. [2021-12-18 19:22:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 19:22:26,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:26,587 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:26,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:26,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:22:26,801 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:26,801 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2021-12-18 19:22:26,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541924020] [2021-12-18 19:22:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:26,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:26,802 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:26,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-18 19:22:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:22:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:29,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:29,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:22:29,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:29,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541924020] [2021-12-18 19:22:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541924020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [860475654] [2021-12-18 19:22:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:29,832 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:22:29,833 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:22:29,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-18 19:22:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:22:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:22:32,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:32,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [860475654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:32,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:32,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-18 19:22:32,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414767885] [2021-12-18 19:22:32,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:32,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:22:32,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:32,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:22:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2021-12-18 19:22:32,763 INFO L87 Difference]: Start difference. First operand 315 states and 387 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:22:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:37,229 INFO L93 Difference]: Finished difference Result 350 states and 406 transitions. [2021-12-18 19:22:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:22:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-12-18 19:22:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:37,230 INFO L225 Difference]: With dead ends: 350 [2021-12-18 19:22:37,230 INFO L226 Difference]: Without dead ends: 350 [2021-12-18 19:22:37,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=117, Invalid=260, Unknown=3, NotChecked=0, Total=380 [2021-12-18 19:22:37,231 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 189 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:37,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 258 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 161 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2021-12-18 19:22:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-18 19:22:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 314. [2021-12-18 19:22:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 281 states have (on average 1.2775800711743772) internal successors, (359), 297 states have internal predecessors, (359), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-18 19:22:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 383 transitions. [2021-12-18 19:22:37,235 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 383 transitions. Word has length 48 [2021-12-18 19:22:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:37,235 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 383 transitions. [2021-12-18 19:22:37,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:22:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 383 transitions. [2021-12-18 19:22:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:22:37,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:37,236 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:37,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:37,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:37,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:37,644 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2021-12-18 19:22:37,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:37,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687213506] [2021-12-18 19:22:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:37,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:37,646 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:37,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-18 19:22:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:22:37,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:42,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:42,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:22:42,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:22:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 19:22:42,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:44,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:22:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687213506] [2021-12-18 19:22:44,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687213506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [713467225] [2021-12-18 19:22:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:44,915 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:44,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:22:44,916 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:22:44,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-18 19:22:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:45,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:22:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:22:49,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:22:49,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:22:49,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:22:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 19:22:49,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:22:52,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [713467225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:22:52,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:22:52,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-18 19:22:52,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213557998] [2021-12-18 19:22:52,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:22:52,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:22:52,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:22:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:22:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2021-12-18 19:22:52,145 INFO L87 Difference]: Start difference. First operand 314 states and 383 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:22:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:22:58,797 INFO L93 Difference]: Finished difference Result 343 states and 403 transitions. [2021-12-18 19:22:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:22:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-18 19:22:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:22:58,798 INFO L225 Difference]: With dead ends: 343 [2021-12-18 19:22:58,798 INFO L226 Difference]: Without dead ends: 343 [2021-12-18 19:22:58,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2021-12-18 19:22:58,799 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 131 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:22:58,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 289 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 189 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2021-12-18 19:22:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-18 19:22:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 314. [2021-12-18 19:22:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 281 states have (on average 1.2740213523131672) internal successors, (358), 297 states have internal predecessors, (358), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-18 19:22:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 382 transitions. [2021-12-18 19:22:58,803 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 382 transitions. Word has length 50 [2021-12-18 19:22:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:22:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 382 transitions. [2021-12-18 19:22:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:22:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 382 transitions. [2021-12-18 19:22:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:22:58,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:22:58,804 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:22:58,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:22:59,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-18 19:22:59,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:22:59,212 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:22:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:22:59,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2021-12-18 19:22:59,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:22:59,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849901376] [2021-12-18 19:22:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:22:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:22:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:22:59,214 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:22:59,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-18 19:22:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:22:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:22:59,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:22:59,542 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:22:59,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 19:23:02,072 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-12-18 19:23:02,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 44 [2021-12-18 19:23:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:02,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:02,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:23:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849901376] [2021-12-18 19:23:02,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849901376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:23:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1224113627] [2021-12-18 19:23:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:02,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:23:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:23:02,243 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:23:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-12-18 19:23:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:23:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:23:02,586 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 19:23:02,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:23:02,788 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:23:02,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 19:23:02,880 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 19:23:02,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 23 [2021-12-18 19:23:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:02,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:03,077 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:23:03,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2021-12-18 19:23:05,358 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:23:05,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2021-12-18 19:23:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:05,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1224113627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:23:05,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:23:05,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-18 19:23:05,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192150837] [2021-12-18 19:23:05,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:23:05,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 19:23:05,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:23:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 19:23:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=620, Unknown=2, NotChecked=0, Total=756 [2021-12-18 19:23:05,728 INFO L87 Difference]: Start difference. First operand 314 states and 382 transitions. Second operand has 27 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 19:23:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:23:13,031 INFO L93 Difference]: Finished difference Result 363 states and 408 transitions. [2021-12-18 19:23:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:23:13,031 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2021-12-18 19:23:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:23:13,032 INFO L225 Difference]: With dead ends: 363 [2021-12-18 19:23:13,032 INFO L226 Difference]: Without dead ends: 363 [2021-12-18 19:23:13,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=426, Invalid=1375, Unknown=5, NotChecked=0, Total=1806 [2021-12-18 19:23:13,033 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 559 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:23:13,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 422 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 279 Invalid, 0 Unknown, 222 Unchecked, 0.5s Time] [2021-12-18 19:23:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-18 19:23:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 321. [2021-12-18 19:23:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 291 states have (on average 1.2405498281786942) internal successors, (361), 304 states have internal predecessors, (361), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:23:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 384 transitions. [2021-12-18 19:23:13,037 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 384 transitions. Word has length 51 [2021-12-18 19:23:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:23:13,037 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 384 transitions. [2021-12-18 19:23:13,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-18 19:23:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 384 transitions. [2021-12-18 19:23:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:23:13,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:23:13,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:23:13,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-12-18 19:23:13,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:23:13,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:23:13,438 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:23:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:23:13,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2021-12-18 19:23:13,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:23:13,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84434328] [2021-12-18 19:23:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:13,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:23:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:23:13,440 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:23:13,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-18 19:23:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:13,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:23:13,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:23:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:23:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:23:18,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:23:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 19:23:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:23:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:23:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:18,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:19,150 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:23:19,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2021-12-18 19:23:21,719 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:23:21,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2021-12-18 19:23:26,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:23:26,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84434328] [2021-12-18 19:23:26,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84434328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:23:26,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1650073080] [2021-12-18 19:23:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:26,268 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:23:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:23:26,269 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:23:26,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-18 19:23:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:23:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:23:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:23:28,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:23:28,969 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:23:28,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 19:23:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:23:29,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:23:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:29,747 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:23:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2021-12-18 19:23:32,180 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:23:32,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2021-12-18 19:23:32,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1650073080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:23:32,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:23:32,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-18 19:23:32,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728842268] [2021-12-18 19:23:32,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:23:32,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:23:32,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:23:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:23:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=155, Unknown=5, NotChecked=0, Total=210 [2021-12-18 19:23:32,617 INFO L87 Difference]: Start difference. First operand 321 states and 384 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:23:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:23:39,042 INFO L93 Difference]: Finished difference Result 358 states and 414 transitions. [2021-12-18 19:23:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:23:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-18 19:23:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:23:39,043 INFO L225 Difference]: With dead ends: 358 [2021-12-18 19:23:39,043 INFO L226 Difference]: Without dead ends: 358 [2021-12-18 19:23:39,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=133, Invalid=321, Unknown=8, NotChecked=0, Total=462 [2021-12-18 19:23:39,044 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 199 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:23:39,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 103 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 78 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2021-12-18 19:23:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-18 19:23:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 320. [2021-12-18 19:23:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.2310344827586206) internal successors, (357), 303 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:23:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 380 transitions. [2021-12-18 19:23:39,048 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 380 transitions. Word has length 51 [2021-12-18 19:23:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:23:39,048 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 380 transitions. [2021-12-18 19:23:39,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:23:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 380 transitions. [2021-12-18 19:23:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:23:39,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:23:39,049 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:23:39,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:23:39,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:23:39,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:23:39,457 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:23:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:23:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2021-12-18 19:23:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:23:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584346765] [2021-12-18 19:23:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:39,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:23:39,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:23:39,458 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:23:39,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-18 19:23:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:23:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:23:39,681 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:23:39,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-18 19:23:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:23:39,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:23:40,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:23:40,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584346765] [2021-12-18 19:23:40,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584346765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:23:40,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:23:40,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-12-18 19:23:40,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458555282] [2021-12-18 19:23:40,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:23:40,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:23:40,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:23:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:23:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:23:40,072 INFO L87 Difference]: Start difference. First operand 320 states and 380 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:23:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:23:40,415 INFO L93 Difference]: Finished difference Result 347 states and 397 transitions. [2021-12-18 19:23:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:23:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-12-18 19:23:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:23:40,416 INFO L225 Difference]: With dead ends: 347 [2021-12-18 19:23:40,416 INFO L226 Difference]: Without dead ends: 347 [2021-12-18 19:23:40,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:23:40,417 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 232 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:23:40,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 222 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-12-18 19:23:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-18 19:23:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2021-12-18 19:23:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.2206896551724138) internal successors, (354), 303 states have internal predecessors, (354), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:23:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 377 transitions. [2021-12-18 19:23:40,422 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 377 transitions. Word has length 51 [2021-12-18 19:23:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:23:40,422 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 377 transitions. [2021-12-18 19:23:40,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 19:23:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 377 transitions. [2021-12-18 19:23:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:23:40,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:23:40,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:23:40,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-18 19:23:40,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:23:40,633 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:23:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:23:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2021-12-18 19:23:40,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:23:40,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782220940] [2021-12-18 19:23:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:40,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:23:40,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:23:40,635 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:23:40,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-18 19:23:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:40,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:23:40,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:23:40,998 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:23:40,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 19:23:43,614 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-12-18 19:23:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 52 [2021-12-18 19:23:43,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:23:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:43,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:43,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:23:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782220940] [2021-12-18 19:23:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782220940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:23:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230722373] [2021-12-18 19:23:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:43,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:23:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:23:43,943 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:23:43,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-18 19:23:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:44,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 19:23:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:23:44,431 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 19:23:44,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 19:23:46,999 INFO L354 Elim1Store]: treesize reduction 49, result has 47.9 percent of original size [2021-12-18 19:23:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 70 [2021-12-18 19:23:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:23:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:23:47,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:23:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230722373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:23:47,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:23:47,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-12-18 19:23:47,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337059072] [2021-12-18 19:23:47,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:23:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:23:47,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:23:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:23:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2021-12-18 19:23:47,401 INFO L87 Difference]: Start difference. First operand 320 states and 377 transitions. Second operand has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:23:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:23:58,767 INFO L93 Difference]: Finished difference Result 354 states and 394 transitions. [2021-12-18 19:23:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:23:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2021-12-18 19:23:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:23:58,769 INFO L225 Difference]: With dead ends: 354 [2021-12-18 19:23:58,769 INFO L226 Difference]: Without dead ends: 354 [2021-12-18 19:23:58,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=232, Invalid=952, Unknown=6, NotChecked=0, Total=1190 [2021-12-18 19:23:58,769 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 321 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:23:58,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 386 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 289 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2021-12-18 19:23:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-18 19:23:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 320. [2021-12-18 19:23:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.2137931034482758) internal successors, (352), 303 states have internal predecessors, (352), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:23:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2021-12-18 19:23:58,773 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 52 [2021-12-18 19:23:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:23:58,773 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2021-12-18 19:23:58,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:23:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2021-12-18 19:23:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:23:58,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:23:58,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:23:58,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-12-18 19:23:58,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-12-18 19:23:59,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:23:59,188 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:23:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:23:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2021-12-18 19:23:59,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:23:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189931751] [2021-12-18 19:23:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:23:59,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:23:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:23:59,189 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:23:59,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-18 19:23:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:23:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:23:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:24:01,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:24:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 19:24:03,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:04,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:24:04,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189931751] [2021-12-18 19:24:04,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189931751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:04,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843057056] [2021-12-18 19:24:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:24:04,073 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:24:04,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:24:04,074 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:24:04,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-18 19:24:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:24:04,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:24:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:24:04,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:24:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-18 19:24:04,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:04,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843057056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:04,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:24:04,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-18 19:24:04,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294342222] [2021-12-18 19:24:04,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:24:04,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:24:04,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:24:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:24:04,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2021-12-18 19:24:04,877 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:24:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:24:09,464 INFO L93 Difference]: Finished difference Result 362 states and 403 transitions. [2021-12-18 19:24:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:24:09,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-18 19:24:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:24:09,466 INFO L225 Difference]: With dead ends: 362 [2021-12-18 19:24:09,466 INFO L226 Difference]: Without dead ends: 362 [2021-12-18 19:24:09,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=161, Invalid=387, Unknown=4, NotChecked=0, Total=552 [2021-12-18 19:24:09,466 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 234 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:24:09,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 231 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 150 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2021-12-18 19:24:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-18 19:24:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 320. [2021-12-18 19:24:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.193103448275862) internal successors, (346), 303 states have internal predecessors, (346), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:24:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 369 transitions. [2021-12-18 19:24:09,470 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 369 transitions. Word has length 52 [2021-12-18 19:24:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:24:09,470 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 369 transitions. [2021-12-18 19:24:09,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:24:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 369 transitions. [2021-12-18 19:24:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:24:09,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:24:09,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:24:09,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-12-18 19:24:09,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-18 19:24:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:24:09,875 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:24:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:24:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2021-12-18 19:24:09,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:24:09,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011519027] [2021-12-18 19:24:09,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:24:09,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:24:09,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:24:09,876 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:24:09,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-18 19:24:09,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:24:09,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:24:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:24:09,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:24:10,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:24:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:24:10,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:10,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:24:10,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011519027] [2021-12-18 19:24:10,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011519027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:10,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1854651567] [2021-12-18 19:24:10,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:24:10,732 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:24:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:24:10,733 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:24:10,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-12-18 19:24:10,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:24:10,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:24:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:24:10,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:24:13,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:24:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:24:13,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:13,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1854651567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:13,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:24:13,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-18 19:24:13,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14981322] [2021-12-18 19:24:13,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:24:13,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:24:13,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:24:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:24:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:24:13,455 INFO L87 Difference]: Start difference. First operand 320 states and 369 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:24:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:24:13,942 INFO L93 Difference]: Finished difference Result 342 states and 384 transitions. [2021-12-18 19:24:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:24:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-12-18 19:24:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:24:13,948 INFO L225 Difference]: With dead ends: 342 [2021-12-18 19:24:13,949 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 19:24:13,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:24:13,949 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 130 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:24:13,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 240 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-12-18 19:24:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 19:24:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 320. [2021-12-18 19:24:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 290 states have (on average 1.186206896551724) internal successors, (344), 303 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-18 19:24:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 367 transitions. [2021-12-18 19:24:13,953 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 367 transitions. Word has length 52 [2021-12-18 19:24:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:24:13,953 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 367 transitions. [2021-12-18 19:24:13,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:24:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 367 transitions. [2021-12-18 19:24:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 19:24:13,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:24:13,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:24:13,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-18 19:24:14,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-12-18 19:24:14,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:24:14,364 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:24:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:24:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1447729377, now seen corresponding path program 1 times [2021-12-18 19:24:14,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:24:14,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441071322] [2021-12-18 19:24:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:24:14,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:24:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:24:14,365 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:24:14,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-18 19:24:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:24:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:24:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:14,914 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:24:14,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:24:15,377 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 19:24:15,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-18 19:24:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:24:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:24:15,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:24:16,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:24:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:24:16,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:24:16,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:24:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:24:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:16,778 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 19:24:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 19:24:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-12-18 19:24:16,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:24:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441071322] [2021-12-18 19:24:16,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441071322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983435711] [2021-12-18 19:24:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:24:16,876 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:24:16,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:24:16,877 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:24:16,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-12-18 19:24:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:24:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:24:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:17,475 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:24:17,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:24:17,786 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 19:24:17,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-18 19:24:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:24:20,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:24:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:24:21,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:24:21,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:24:21,140 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:24:21,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:24:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:24:21,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:21,363 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-18 19:24:21,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 19:24:21,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-12-18 19:24:21,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983435711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:21,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:24:21,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-12-18 19:24:21,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524410981] [2021-12-18 19:24:21,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:24:21,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:24:21,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:24:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:24:21,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:24:21,454 INFO L87 Difference]: Start difference. First operand 320 states and 367 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 19:24:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:24:25,129 INFO L93 Difference]: Finished difference Result 360 states and 403 transitions. [2021-12-18 19:24:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:24:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2021-12-18 19:24:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:24:25,131 INFO L225 Difference]: With dead ends: 360 [2021-12-18 19:24:25,131 INFO L226 Difference]: Without dead ends: 360 [2021-12-18 19:24:25,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:24:25,131 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 224 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:24:25,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 446 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 401 Unchecked, 0.4s Time] [2021-12-18 19:24:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-18 19:24:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 339. [2021-12-18 19:24:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 307 states have (on average 1.1758957654723128) internal successors, (361), 320 states have internal predecessors, (361), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-18 19:24:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 388 transitions. [2021-12-18 19:24:25,135 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 388 transitions. Word has length 53 [2021-12-18 19:24:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:24:25,135 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 388 transitions. [2021-12-18 19:24:25,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 19:24:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 388 transitions. [2021-12-18 19:24:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 19:24:25,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:24:25,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:24:25,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-12-18 19:24:25,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-18 19:24:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:24:25,539 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:24:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:24:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2021-12-18 19:24:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:24:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640087584] [2021-12-18 19:24:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:24:25,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:24:25,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:24:25,541 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:24:25,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-18 19:24:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:24:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:24:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:25,823 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:24:25,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 19:24:28,219 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 19:24:28,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2021-12-18 19:24:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:24:28,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:28,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:24:28,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640087584] [2021-12-18 19:24:28,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640087584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:28,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1204458264] [2021-12-18 19:24:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:24:28,481 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:24:28,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:24:28,482 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:24:28,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-12-18 19:24:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:24:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:24:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:24:32,999 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 19:24:32,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 19:24:39,558 INFO L354 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2021-12-18 19:24:39,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2021-12-18 19:24:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:24:39,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:24:41,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1204458264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:24:41,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:24:41,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-18 19:24:41,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064754024] [2021-12-18 19:24:41,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:24:41,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:24:41,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:24:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:24:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=463, Unknown=7, NotChecked=0, Total=552 [2021-12-18 19:24:41,879 INFO L87 Difference]: Start difference. First operand 339 states and 388 transitions. Second operand has 20 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:25:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:25:03,865 INFO L93 Difference]: Finished difference Result 382 states and 423 transitions. [2021-12-18 19:25:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:25:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2021-12-18 19:25:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:25:03,866 INFO L225 Difference]: With dead ends: 382 [2021-12-18 19:25:03,866 INFO L226 Difference]: Without dead ends: 382 [2021-12-18 19:25:03,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=264, Invalid=1208, Unknown=10, NotChecked=0, Total=1482 [2021-12-18 19:25:03,867 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 425 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:25:03,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 479 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 175 Unchecked, 0.5s Time] [2021-12-18 19:25:03,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-18 19:25:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 358. [2021-12-18 19:25:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1625766871165644) internal successors, (379), 339 states have internal predecessors, (379), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 19:25:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 404 transitions. [2021-12-18 19:25:03,870 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 404 transitions. Word has length 54 [2021-12-18 19:25:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:25:03,871 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 404 transitions. [2021-12-18 19:25:03,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.352941176470588) internal successors, (74), 15 states have internal predecessors, (74), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:25:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 404 transitions. [2021-12-18 19:25:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 19:25:03,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:25:03,871 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:25:03,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-12-18 19:25:04,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-12-18 19:25:04,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:04,275 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:25:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:25:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2021-12-18 19:25:04,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:25:04,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160073358] [2021-12-18 19:25:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:25:04,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:25:04,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:25:04,280 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:25:04,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-18 19:25:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:25:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:25:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:04,570 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:25:04,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:25:04,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:25:04,841 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:25:04,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 19:25:05,760 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:25:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:25:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:25:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:06,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 19:25:06,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:25:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160073358] [2021-12-18 19:25:06,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160073358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342983097] [2021-12-18 19:25:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:25:06,244 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:25:06,245 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:25:06,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-12-18 19:25:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:25:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:25:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:06,557 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:25:06,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:25:06,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:25:06,741 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:25:06,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 19:25:07,525 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:25:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:25:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:25:07,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:07,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 19:25:07,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342983097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:07,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:25:07,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-18 19:25:07,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324310105] [2021-12-18 19:25:07,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:25:07,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:25:07,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:25:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:25:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-12-18 19:25:07,770 INFO L87 Difference]: Start difference. First operand 358 states and 404 transitions. Second operand has 14 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:25:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:25:14,403 INFO L93 Difference]: Finished difference Result 374 states and 414 transitions. [2021-12-18 19:25:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 19:25:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2021-12-18 19:25:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:25:14,404 INFO L225 Difference]: With dead ends: 374 [2021-12-18 19:25:14,404 INFO L226 Difference]: Without dead ends: 374 [2021-12-18 19:25:14,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=116, Invalid=481, Unknown=3, NotChecked=0, Total=600 [2021-12-18 19:25:14,405 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 201 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:25:14,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 242 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2021-12-18 19:25:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-18 19:25:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2021-12-18 19:25:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1595092024539877) internal successors, (378), 339 states have internal predecessors, (378), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 19:25:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 403 transitions. [2021-12-18 19:25:14,409 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 403 transitions. Word has length 55 [2021-12-18 19:25:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:25:14,409 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 403 transitions. [2021-12-18 19:25:14,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:25:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 403 transitions. [2021-12-18 19:25:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 19:25:14,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:25:14,410 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:25:14,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-18 19:25:14,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-12-18 19:25:14,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:14,817 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:25:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:25:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2021-12-18 19:25:14,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:25:14,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363893202] [2021-12-18 19:25:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:25:14,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:25:14,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:25:14,819 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:25:14,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-18 19:25:14,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:25:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:25:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 19:25:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:25:17,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:25:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:25:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:20,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:25:20,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363893202] [2021-12-18 19:25:20,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363893202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:20,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312144534] [2021-12-18 19:25:20,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:25:20,594 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:20,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:25:20,595 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:25:20,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-12-18 19:25:20,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:25:20,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:25:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:25:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:25:23,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:25:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 19:25:23,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:26,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1312144534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:26,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:25:26,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-18 19:25:26,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394526077] [2021-12-18 19:25:26,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:25:26,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:25:26,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:25:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:25:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-12-18 19:25:26,089 INFO L87 Difference]: Start difference. First operand 358 states and 403 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:25:30,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:25:30,770 INFO L93 Difference]: Finished difference Result 379 states and 418 transitions. [2021-12-18 19:25:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:25:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-12-18 19:25:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:25:30,771 INFO L225 Difference]: With dead ends: 379 [2021-12-18 19:25:30,771 INFO L226 Difference]: Without dead ends: 379 [2021-12-18 19:25:30,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=155, Invalid=393, Unknown=4, NotChecked=0, Total=552 [2021-12-18 19:25:30,772 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 194 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:25:30,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 278 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 172 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2021-12-18 19:25:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-18 19:25:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 358. [2021-12-18 19:25:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1503067484662577) internal successors, (375), 339 states have internal predecessors, (375), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 19:25:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2021-12-18 19:25:30,776 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 56 [2021-12-18 19:25:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:25:30,776 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2021-12-18 19:25:30,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:25:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2021-12-18 19:25:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:25:30,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:25:30,777 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:25:30,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-12-18 19:25:30,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2021-12-18 19:25:31,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:31,190 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:25:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:25:31,191 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2021-12-18 19:25:31,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:25:31,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654399978] [2021-12-18 19:25:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:25:31,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:25:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:25:31,192 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:25:31,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-18 19:25:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:25:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:25:31,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:31,698 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:25:31,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:25:32,002 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:25:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 19:25:32,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:25:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:25:32,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:25:32,797 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:25:32,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:25:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:25:32,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:33,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 19:25:34,003 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:25:34,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2021-12-18 19:25:34,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:25:34,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654399978] [2021-12-18 19:25:34,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654399978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:34,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218666768] [2021-12-18 19:25:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:25:34,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:25:34,134 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:25:34,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-12-18 19:25:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:25:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:25:34,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:34,627 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:25:34,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:25:34,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:25:34,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-18 19:25:35,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:25:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:25:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:25:35,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:25:35,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:25:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:25:35,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 19:25:36,086 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:25:36,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2021-12-18 19:25:36,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218666768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:36,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:25:36,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-12-18 19:25:36,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138087022] [2021-12-18 19:25:36,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:25:36,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 19:25:36,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:25:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 19:25:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:25:36,221 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:25:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:25:46,319 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2021-12-18 19:25:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:25:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2021-12-18 19:25:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:25:46,321 INFO L225 Difference]: With dead ends: 369 [2021-12-18 19:25:46,321 INFO L226 Difference]: Without dead ends: 369 [2021-12-18 19:25:46,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=244, Invalid=745, Unknown=3, NotChecked=0, Total=992 [2021-12-18 19:25:46,322 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 248 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:25:46,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 470 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 166 Invalid, 0 Unknown, 317 Unchecked, 0.4s Time] [2021-12-18 19:25:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-18 19:25:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 358. [2021-12-18 19:25:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1411042944785277) internal successors, (372), 339 states have internal predecessors, (372), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 19:25:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 397 transitions. [2021-12-18 19:25:46,325 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 397 transitions. Word has length 59 [2021-12-18 19:25:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:25:46,325 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 397 transitions. [2021-12-18 19:25:46,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:25:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 397 transitions. [2021-12-18 19:25:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 19:25:46,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:25:46,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:25:46,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-18 19:25:46,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-12-18 19:25:46,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:46,735 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:25:46,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:25:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2021-12-18 19:25:46,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:25:46,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046761198] [2021-12-18 19:25:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:25:46,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:25:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:25:46,737 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:25:46,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-18 19:25:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:25:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:25:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:47,340 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:25:47,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 19:25:50,038 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 19:25:50,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2021-12-18 19:25:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:25:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:25:50,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:25:50,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:25:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046761198] [2021-12-18 19:25:50,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046761198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:25:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064664637] [2021-12-18 19:25:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:25:50,775 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:25:50,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:25:50,776 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:25:50,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-12-18 19:25:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:25:51,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:25:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:25:53,949 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-18 19:25:53,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-12-18 19:26:00,788 INFO L354 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2021-12-18 19:26:00,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2021-12-18 19:26:01,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:26:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:26:01,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:26:03,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064664637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:26:03,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:26:03,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-18 19:26:03,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393977026] [2021-12-18 19:26:03,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:26:03,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:26:03,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:26:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:26:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=648, Unknown=6, NotChecked=0, Total=756 [2021-12-18 19:26:03,551 INFO L87 Difference]: Start difference. First operand 358 states and 397 transitions. Second operand has 22 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:26:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:26:52,998 INFO L93 Difference]: Finished difference Result 387 states and 423 transitions. [2021-12-18 19:26:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:26:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 60 [2021-12-18 19:26:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:26:53,000 INFO L225 Difference]: With dead ends: 387 [2021-12-18 19:26:53,000 INFO L226 Difference]: Without dead ends: 387 [2021-12-18 19:26:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=472, Invalid=1961, Unknown=17, NotChecked=0, Total=2450 [2021-12-18 19:26:53,001 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 320 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:26:53,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 448 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 414 Invalid, 0 Unknown, 244 Unchecked, 0.7s Time] [2021-12-18 19:26:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-18 19:26:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 357. [2021-12-18 19:26:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 326 states have (on average 1.1349693251533743) internal successors, (370), 338 states have internal predecessors, (370), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 19:26:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 395 transitions. [2021-12-18 19:26:53,004 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 395 transitions. Word has length 60 [2021-12-18 19:26:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:26:53,005 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 395 transitions. [2021-12-18 19:26:53,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-18 19:26:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 395 transitions. [2021-12-18 19:26:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:26:53,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:26:53,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:26:53,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-12-18 19:26:53,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-12-18 19:26:53,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:26:53,410 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:26:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:26:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2021-12-18 19:26:53,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:26:53,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380324380] [2021-12-18 19:26:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:26:53,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:26:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:26:53,412 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:26:53,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-18 19:26:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:26:53,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 19:26:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:26:54,093 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:26:54,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:26:54,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:26:54,814 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:26:54,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 19:26:56,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:26:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:26:56,932 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:26:56,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:26:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:26:57,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:26:57,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-18 19:26:57,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:26:57,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380324380] [2021-12-18 19:26:57,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380324380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:26:57,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1129891939] [2021-12-18 19:26:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:26:57,740 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:26:57,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:26:57,741 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:26:57,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-12-18 19:26:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:26:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-18 19:26:57,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:26:58,420 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:26:58,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:26:58,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:26:58,982 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:26:58,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 19:27:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:27:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:27:00,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:27:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 19:27:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:27:00,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:27:01,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-18 19:27:01,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1129891939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:27:01,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:27:01,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-12-18 19:27:01,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652743450] [2021-12-18 19:27:01,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:27:01,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 19:27:01,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:27:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 19:27:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:27:01,290 INFO L87 Difference]: Start difference. First operand 357 states and 395 transitions. Second operand has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:27:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:27:01,688 INFO L93 Difference]: Finished difference Result 368 states and 404 transitions. [2021-12-18 19:27:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 19:27:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2021-12-18 19:27:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:27:01,690 INFO L225 Difference]: With dead ends: 368 [2021-12-18 19:27:01,690 INFO L226 Difference]: Without dead ends: 368 [2021-12-18 19:27:01,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:27:01,690 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 161 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:27:01,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 331 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 271 Unchecked, 0.2s Time] [2021-12-18 19:27:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-18 19:27:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 362. [2021-12-18 19:27:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 331 states have (on average 1.1329305135951662) internal successors, (375), 343 states have internal predecessors, (375), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 19:27:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 400 transitions. [2021-12-18 19:27:01,694 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 400 transitions. Word has length 61 [2021-12-18 19:27:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:27:01,694 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 400 transitions. [2021-12-18 19:27:01,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 19:27:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 400 transitions. [2021-12-18 19:27:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:27:01,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:27:01,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:01,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-12-18 19:27:01,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2021-12-18 19:27:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:27:02,103 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:27:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:27:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1148136154, now seen corresponding path program 2 times [2021-12-18 19:27:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:27:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487579688] [2021-12-18 19:27:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:27:02,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:27:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:27:02,105 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:27:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-18 19:27:02,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:27:02,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:27:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 19:27:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:27:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:27:02,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:27:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:27:04,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:27:04,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487579688] [2021-12-18 19:27:04,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487579688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:27:04,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:27:04,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-12-18 19:27:04,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082454356] [2021-12-18 19:27:04,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:27:04,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:27:04,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:27:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:27:04,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:27:04,024 INFO L87 Difference]: Start difference. First operand 362 states and 400 transitions. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:27:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:27:04,405 INFO L93 Difference]: Finished difference Result 362 states and 393 transitions. [2021-12-18 19:27:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:27:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2021-12-18 19:27:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:27:04,407 INFO L225 Difference]: With dead ends: 362 [2021-12-18 19:27:04,407 INFO L226 Difference]: Without dead ends: 362 [2021-12-18 19:27:04,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:27:04,407 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 128 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:27:04,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 192 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:27:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-18 19:27:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 346. [2021-12-18 19:27:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 317 states have (on average 1.1198738170347002) internal successors, (355), 329 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 19:27:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 377 transitions. [2021-12-18 19:27:04,411 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 377 transitions. Word has length 61 [2021-12-18 19:27:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:27:04,411 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 377 transitions. [2021-12-18 19:27:04,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:27:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 377 transitions. [2021-12-18 19:27:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 19:27:04,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:27:04,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:04,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-12-18 19:27:04,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:27:04,623 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:27:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:27:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash -340935575, now seen corresponding path program 1 times [2021-12-18 19:27:04,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:27:04,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063667212] [2021-12-18 19:27:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:27:04,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:27:04,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:27:04,625 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:27:04,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-12-18 19:27:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:27:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:27:04,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:27:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 19:27:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:27:05,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:27:05,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-18 19:27:05,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:27:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063667212] [2021-12-18 19:27:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063667212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:27:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070917667] [2021-12-18 19:27:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:27:05,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-18 19:27:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-18 19:27:05,663 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-18 19:27:05,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-12-18 19:27:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:27:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:27:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:27:06,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 19:27:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 19:27:06,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:27:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 19:27:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1070917667] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 19:27:06,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:27:06,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 5] total 20 [2021-12-18 19:27:06,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039332278] [2021-12-18 19:27:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:27:06,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:27:06,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:27:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:27:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:27:06,776 INFO L87 Difference]: Start difference. First operand 346 states and 377 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:27:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:27:07,151 INFO L93 Difference]: Finished difference Result 340 states and 363 transitions. [2021-12-18 19:27:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:27:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2021-12-18 19:27:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:27:07,153 INFO L225 Difference]: With dead ends: 340 [2021-12-18 19:27:07,153 INFO L226 Difference]: Without dead ends: 340 [2021-12-18 19:27:07,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:27:07,154 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 116 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:27:07,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 91 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:27:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-18 19:27:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-12-18 19:27:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 312 states have (on average 1.0929487179487178) internal successors, (341), 323 states have internal predecessors, (341), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 19:27:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 363 transitions. [2021-12-18 19:27:07,157 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 363 transitions. Word has length 63 [2021-12-18 19:27:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:27:07,158 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 363 transitions. [2021-12-18 19:27:07,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:27:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 363 transitions. [2021-12-18 19:27:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 19:27:07,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:27:07,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:07,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-12-18 19:27:07,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2021-12-18 19:27:07,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-18 19:27:07,566 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:27:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:27:07,567 INFO L85 PathProgramCache]: Analyzing trace with hash 40877192, now seen corresponding path program 1 times [2021-12-18 19:27:07,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:27:07,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970876788] [2021-12-18 19:27:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:27:07,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:27:07,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:27:07,568 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:27:07,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-12-18 19:27:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:27:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 19:27:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:27:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-18 19:27:07,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:27:07,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:27:07,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970876788] [2021-12-18 19:27:07,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970876788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:27:07,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:27:07,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:27:07,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658012357] [2021-12-18 19:27:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:27:07,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:27:07,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:27:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:27:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:27:07,744 INFO L87 Difference]: Start difference. First operand 340 states and 363 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:27:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:27:07,847 INFO L93 Difference]: Finished difference Result 347 states and 370 transitions. [2021-12-18 19:27:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:27:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2021-12-18 19:27:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:27:07,849 INFO L225 Difference]: With dead ends: 347 [2021-12-18 19:27:07,849 INFO L226 Difference]: Without dead ends: 347 [2021-12-18 19:27:07,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:27:07,850 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:27:07,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 67 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:27:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-18 19:27:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2021-12-18 19:27:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 312 states have (on average 1.0897435897435896) internal successors, (340), 322 states have internal predecessors, (340), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 19:27:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 362 transitions. [2021-12-18 19:27:07,855 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 362 transitions. Word has length 63 [2021-12-18 19:27:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:27:07,855 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 362 transitions. [2021-12-18 19:27:07,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 19:27:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 362 transitions. [2021-12-18 19:27:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:27:07,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:27:07,856 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:07,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-12-18 19:27:08,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:27:08,064 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:27:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:27:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash -460493020, now seen corresponding path program 1 times [2021-12-18 19:27:08,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:27:08,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291389219] [2021-12-18 19:27:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:27:08,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:27:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:27:08,065 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:27:08,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-18 19:27:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:27:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 19:27:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:27:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:27:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:27:09,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 19:27:09,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-18 19:27:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:27:10,535 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:27:10,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291389219] [2021-12-18 19:27:10,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291389219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:27:10,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:27:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-12-18 19:27:10,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880044853] [2021-12-18 19:27:10,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:27:10,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 19:27:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:27:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 19:27:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:27:10,536 INFO L87 Difference]: Start difference. First operand 339 states and 362 transitions. Second operand has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:27:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:27:11,690 INFO L93 Difference]: Finished difference Result 397 states and 423 transitions. [2021-12-18 19:27:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:27:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2021-12-18 19:27:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:27:11,692 INFO L225 Difference]: With dead ends: 397 [2021-12-18 19:27:11,692 INFO L226 Difference]: Without dead ends: 397 [2021-12-18 19:27:11,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:27:11,693 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 214 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:27:11,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 232 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:27:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-18 19:27:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 336. [2021-12-18 19:27:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 312 states have (on average 1.080128205128205) internal successors, (337), 319 states have internal predecessors, (337), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 19:27:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 359 transitions. [2021-12-18 19:27:11,697 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 359 transitions. Word has length 65 [2021-12-18 19:27:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:27:11,697 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 359 transitions. [2021-12-18 19:27:11,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 19:27:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 359 transitions. [2021-12-18 19:27:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:27:11,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:27:11,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:11,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-12-18 19:27:11,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:27:11,905 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:27:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:27:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash 701075492, now seen corresponding path program 1 times [2021-12-18 19:27:11,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:27:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32056524] [2021-12-18 19:27:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:27:11,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:27:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:27:11,907 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:27:11,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-12-18 19:27:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:27:12,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 19:27:12,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:27:12,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:27:12,471 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 19:27:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 27 [2021-12-18 19:27:12,543 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 19:27:12,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-18 19:27:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:27:12,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:27:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:27:13,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 19:27:13,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32056524] [2021-12-18 19:27:13,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32056524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:27:13,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 19:27:13,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-12-18 19:27:13,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055065399] [2021-12-18 19:27:13,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 19:27:13,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:27:13,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 19:27:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:27:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:27:13,071 INFO L87 Difference]: Start difference. First operand 336 states and 359 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 19:27:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:27:13,279 INFO L93 Difference]: Finished difference Result 355 states and 375 transitions. [2021-12-18 19:27:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:27:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-12-18 19:27:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:27:13,280 INFO L225 Difference]: With dead ends: 355 [2021-12-18 19:27:13,280 INFO L226 Difference]: Without dead ends: 355 [2021-12-18 19:27:13,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:27:13,280 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:27:13,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 253 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2021-12-18 19:27:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-18 19:27:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 292. [2021-12-18 19:27:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 270 states have (on average 1.0740740740740742) internal successors, (290), 277 states have internal predecessors, (290), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-18 19:27:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 310 transitions. [2021-12-18 19:27:13,283 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 310 transitions. Word has length 66 [2021-12-18 19:27:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:27:13,284 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 310 transitions. [2021-12-18 19:27:13,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-18 19:27:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 310 transitions. [2021-12-18 19:27:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 19:27:13,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:27:13,285 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:13,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-12-18 19:27:13,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:27:13,495 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-18 19:27:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:27:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1953429379, now seen corresponding path program 1 times [2021-12-18 19:27:13,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 19:27:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923093470] [2021-12-18 19:27:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:27:13,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 19:27:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 19:27:13,497 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 19:27:13,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-12-18 19:27:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:27:13,641 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-18 19:27:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-18 19:27:13,806 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-18 19:27:13,806 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-18 19:27:13,813 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2021-12-18 19:27:13,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-12-18 19:27:13,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-12-18 19:27:13,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2021-12-18 19:27:13,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (12 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2021-12-18 19:27:13,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2021-12-18 19:27:13,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2021-12-18 19:27:13,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2021-12-18 19:27:13,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2021-12-18 19:27:13,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-12-18 19:27:14,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 19:27:14,028 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:27:14,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 19:27:14,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:27:14 BoogieIcfgContainer [2021-12-18 19:27:14,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 19:27:14,085 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 19:27:14,085 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 19:27:14,086 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 19:27:14,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:21:20" (3/4) ... [2021-12-18 19:27:14,088 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-18 19:27:14,088 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 19:27:14,088 INFO L158 Benchmark]: Toolchain (without parser) took 354325.68ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 48.6MB in the beginning and 31.1MB in the end (delta: 17.5MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2021-12-18 19:27:14,088 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 69.2MB. Free memory was 50.0MB in the beginning and 49.9MB in the end (delta: 52.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:27:14,088 INFO L158 Benchmark]: CACSL2BoogieTranslator took 382.91ms. Allocated memory is still 69.2MB. Free memory was 48.4MB in the beginning and 41.8MB in the end (delta: 6.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-18 19:27:14,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.63ms. Allocated memory is still 69.2MB. Free memory was 41.8MB in the beginning and 39.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:27:14,090 INFO L158 Benchmark]: Boogie Preprocessor took 44.21ms. Allocated memory is still 69.2MB. Free memory was 39.4MB in the beginning and 37.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:27:14,094 INFO L158 Benchmark]: RCFGBuilder took 421.03ms. Allocated memory is still 69.2MB. Free memory was 37.6MB in the beginning and 43.4MB in the end (delta: -5.8MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-12-18 19:27:14,094 INFO L158 Benchmark]: TraceAbstraction took 353413.43ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 43.1MB in the beginning and 31.1MB in the end (delta: 12.0MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. [2021-12-18 19:27:14,094 INFO L158 Benchmark]: Witness Printer took 3.46ms. Allocated memory is still 90.2MB. Free memory is still 31.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:27:14,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 69.2MB. Free memory was 50.0MB in the beginning and 49.9MB in the end (delta: 52.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 382.91ms. Allocated memory is still 69.2MB. Free memory was 48.4MB in the beginning and 41.8MB in the end (delta: 6.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.63ms. Allocated memory is still 69.2MB. Free memory was 41.8MB in the beginning and 39.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.21ms. Allocated memory is still 69.2MB. Free memory was 39.4MB in the beginning and 37.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.03ms. Allocated memory is still 69.2MB. Free memory was 37.6MB in the beginning and 43.4MB in the end (delta: -5.8MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * TraceAbstraction took 353413.43ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 43.1MB in the beginning and 31.1MB in the end (delta: 12.0MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. * Witness Printer took 3.46ms. Allocated memory is still 90.2MB. Free memory is still 31.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=null, \old(global)=null, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 67 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 353.3s, OverallIterations: 47, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 163.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9066 SdHoareTripleChecker+Valid, 13.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9060 mSDsluCounter, 12363 SdHoareTripleChecker+Invalid, 11.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2899 IncrementalHoareTripleChecker+Unchecked, 9424 mSDsCounter, 825 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6636 IncrementalHoareTripleChecker+Invalid, 10360 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 825 mSolverCounterUnsat, 2939 mSDtfsCounter, 6636 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3996 GetRequests, 3235 SyntacticMatches, 88 SemanticMatches, 673 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 272.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=757occurred in iteration=20, InterpolantAutomatonStates: 505, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 46 MinimizatonAttempts, 2627 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 168.1s InterpolantComputationTime, 2752 NumberOfCodeBlocks, 2752 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 3261 ConstructedInterpolants, 514 QuantifiedInterpolants, 45322 SizeOfPredicates, 308 NumberOfNonLiveVariables, 10623 ConjunctsInSsa, 957 ConjunctsInUnsatCore, 81 InterpolantComputations, 14 PerfectInterpolantSequences, 1051/2077 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-18 19:27:14,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample